How to keep in touch with friends as an adult: a realistic system

The most reliable way to keep in touch with friends as an adult is to stop relying on memory and give each friendship a minimum rhythm based on how close you are: roughly weekly for your 5 closest people, monthly for the next 10, every two to three months for the next 35, and once a year for everyone else in your circle of about 150. Then spend 15 minutes a week checking who’s overdue, and keep most contacts small: a specific text, a voice note, or a plan with a date.

This guide explains where those numbers come from (Robin Dunbar’s research on friendship circles and Jeffrey Hall’s research on how many hours friendships take), how to set the system up in about 30 minutes, what to actually send, and a template you can copy. It works with a notebook, a spreadsheet or an app.

Why do friendships fade in adulthood?

Friendships fade because they need regular contact and adult life removes the structures (school, shared housing, the same schedule) that used to supply it automatically. It’s rarely a decision. It’s a slow drop in contact that nobody notices until the friendship feels awkward to restart.

The research is blunt about this:

• Friendships decay without contact; family mostly doesn’t. Robin Dunbar, the Oxford psychologist behind “Dunbar’s number”, writes that family relationships survive long gaps, while friendships lose emotional closeness quickly unless they’re reinforced. In a 2025 review he notes that closeness drops measurably within a few months of too little contact, and that it takes about three years of silence for someone from your inner circles to slip out of your circle of 150 altogether. In an earlier paper he puts it simply: most friendships die quietly from reduced contact.
• The time has shrunk. The US Bureau of Labor Statistics’ American Time Use Survey found people spent 35 minutes a day socializing and communicating in 2025, down from 41 minutes in 2015, and only 30% did any of it on an average day (38% in 2015).
• Close friendships are expensive to rebuild. In two studies of people making new friends (published in 2018), Jeffrey Hall at the University of Kansas estimated that it takes about 40 to 60 hours together to go from acquaintance to casual friend, 80 to 100 hours to become friends, and more than 200 hours to become close friends. Every close friendship you already have represents hundreds of hours you don’t want to repeat with someone new.

The good news hides in the same data. If friendships fade from too little contact, a modest, regular amount of contact keeps them going. You don’t need more willpower. You need a rhythm.

How often should you contact each friend?

Contact your closest five people at least weekly, the next ten at least monthly, and your wider circle of about 150 at least yearly. Those minimums come from Dunbar’s work; the every-two-to-three-months rhythm for the layer in between is our suggestion, because his 2025 review doesn’t give one.

Dunbar’s research describes personal networks as circles inside circles. Each layer is about three times the size of the one inside it, and the counts are cumulative: the 15 includes the 5, the 50 includes the 15, and so on. In his 2025 review he links each layer to a minimum contact frequency needed to keep the relationship stable, and stresses that these are minimums, not averages.

Circle	About how many	Typically who	Minimum contact	What a typical touch looks like
Core	5	Partner, best friends, closest family	Weekly (Dunbar)	A real exchange most weeks; a call or meetup most months
Close	15 (10 more)	Friends you’d call with big news	Monthly (Dunbar)	A specific message or call each month; see them a few times a year
Good friends	50 (35 more)	Friends you enjoy but don’t see often	Every 2–3 months (our suggestion)	A check-in, a shared link with a real note, a group plan
Friends	150 (100 more)	Old colleagues, school friends, friends of friends	Yearly (Dunbar)	A birthday message, a congratulations, a once-a-year catch-up
Acquaintances	500 (350 more)	People you know, but not closely	No rhythm needed	Reconnect when there’s a reason

Two details from the research make this easier:

• The effort is supposed to be lopsided. Dunbar’s 2020 paper reports that about 40% of people’s social effort goes to the five closest people and another 20% to the next ten. Trying to keep 40 people on a weekly rhythm is a recipe for burning out and dropping everyone.
• The channel matters less than the contact happening. Dunbar finds the same contact rhythms whether people meet face to face, call, text or post on social media. Texting is a legitimate way to keep the rhythm, which matches how people already behave: in a Pew Research Center survey published in January 2025, 61% of US adults with close friends texted one at least a few times a week, while 29% saw one in person that often.

One caveat: voice and presence still count for more. In experiments by Amit Kumar and Nicholas Epley, people who reconnected with an old friend by phone, or chatted by voice rather than text, felt more connected and no more awkward, even though people tend to expect a call to feel more awkward than it does. Use texts to keep the rhythm, and calls and meetups to keep the closeness. For a deeper look at the layers and the criticism of Dunbar’s number, see Dunbar’s number and your friendship circles.

Step 1: Sort your people into circles (once, about 30 minutes)

Write down everyone you’d be sad to lose touch with, then place each person in a circle. Don’t aim to fill the numbers: most people’s lists are smaller than 5-15-50-150, and that’s fine.

1. Brain-dump names. Scroll your recent chats, your photos from the last two years and your contacts. Write every name that gives you a small “I miss them” feeling.
2. Pick your core five. Who would you call first with very good or very bad news? Include family if they belong there. Family uses up slots too, which is one reason people from big families tend to report fewer friends.
3. Pick the next ten. People you’d want to know about a new job or a move within a week or two of it happening.
4. Put the rest into “good friends” or “friends”. If you hesitate, choose the outer circle. You can promote people later.
5. Note the channel each person actually uses. WhatsApp, iMessage, Instagram, a phone call. Contacting people where they already talk removes friction.

Re-sort every few months. Dunbar notes that the inner five barely change (about one person every ten years), but up to 30% of people in the outer layers move circles or drop out in a given year. New friends arrive, old ones drift, and the list should reflect your life now.

Step 2: Decide what counts as “in touch”

A touch counts when there’s a two-way exchange about the other person’s life. A like or an emoji reaction keeps a thread warm, but it doesn’t reset the clock.

Jeffrey Hall’s 2023 study of more than 900 people on five campuses gives a useful definition of a quality conversation. Participants were asked to have one of seven kinds of conversation with a friend in a day:

• catching up
• meaningful talk
• joking around
• showing care
• listening
• valuing the other person and their opinions
• offering a sincere compliment

By the end of the day, people who’d had one of these conversations reported less stress, more connection and better wellbeing. It didn’t matter much which kind. More than one was better, and face-to-face conversations helped most. In other words, the bar for “in touch” is a real exchange, not a long one.

Step 3: Run a 15-minute weekly review

The weekly review is what turns a list into a habit. Pick a fixed slot (Sunday evening works for many people) and do the same five things.

1. Sort by who’s overdue. Start with the core and close circles. Anyone past their minimum goes to the top.
2. Send three messages. Not ten. Three specific messages you’d actually want to receive (examples below).
3. Put one plan on the calendar. A call, a walk, a dinner. A plan only counts once it has a date.
4. Write down what you learned. If someone mentioned an interview, a move or a sick parent, note it next to their name with a rough date.
5. Update “last real contact”. This is the only number the system needs.

If weekly batches don’t suit you, do one person a day instead. When Harvard’s Making Caring Common project asked Americans in 2024 what would help with loneliness, the solution people endorsed most, lonely adults included, was taking time each day to reach out to a friend or family member.

Step 4: Keep each touch small and specific

The best keep-in-touch message is short, about them, and easy to answer. Specific beats long: “How did the interview go?” lands better than three paragraphs of your own news, because it shows you remembered.

Here are examples you can adapt. Change the wording to sound like you; a message that reads like a template defeats the point.

Situation	Example message
You remember something they told you	“How did the interview at the design studio go? I’ve been wondering since you mentioned it.”
Something made you think of them	“A bakery near me does cardamom buns now and I immediately thought of your Stockholm story. Have you found any good ones back home?”
They have news and you’re busy	“No need to reply properly, I just saw the marathon photos. Huge. Proud of you.”
You want to talk but plans are hard	“Free for a 30-minute call Thursday after 7 or Sunday morning? No agenda.”
You want it to happen without organizing every time	“Want to make first-Sunday calls a thing? Same time every month, so neither of us has to plan it.”
It’s been a while and you feel bad	“I’ve been bad at staying in touch this year and I miss you. What’s the best thing that’s happened to you lately?”
Low-effort but personal	A photo of something you both know, with one line: “Found this at my parents’ place. Year 9 us.”
They’re going through something	“Thinking of you this week with your dad’s surgery. Do you want distraction or a call?”
You’ll be near them	“I’m in town 14–16 March. Dinner on the 15th? I’ll book somewhere near you.”

Three habits make these work:

• Ask one question, not five. One easy question gets a reply; a questionnaire gets postponed.
• Give permission not to reply properly. “No need to reply” lowers the pressure for friends who are as stretched as you are.
• Use voice for the inner circles. A two-minute voice note or call carries more warmth than the same words typed, for the reasons in the Kumar and Epley research above.

Step 5: Turn “we should catch up” into a date

“We should catch up soon” is where many adult friendships stall: both people mean it, and neither sets a date. The fix is to always offer specifics.

• Offer two options. “Thursday evening or Sunday morning?” is far easier to answer than “when are you free?”
• Create standing rituals. A monthly call on the first Sunday, a yearly trip with university friends, a birthday dinner you always host. Rituals remove the planning cost, which is the part that usually kills catch-ups.
• Piggyback on what you already do. Invite a friend to the run, market trip or errand you’d do anyway.
• Book the next one before the current one ends. At the end of a good dinner, get the next date in both calendars.

If a chat already contains a half-made plan (“let’s do that hike when it’s cooler”), go back to it. Plans without dates are among the easiest things to rescue, and the other person has usually forgotten them too.

The keep-in-touch template (copy this)

Copy this table into Notes, a spreadsheet or a document. The example rows are made up.

Name	Circle	Minimum rhythm	Last real contact	Next touch by	What’s going on for them	Best channel
Maya	Core (5)	Weekly	Sun 12 Oct, call	Sun 19 Oct	First marathon on the 26th; flat hunting	WhatsApp voice notes
Daniel	Close (15)	Monthly	2 Oct, texts	2 Nov	Started a new hospital job in Leeds	iMessage
Priya	Good friends (50)	Every 2–3 months	Late Aug, her birthday	Mid Nov	Doing a teaching qualification	Instagram DMs
Tom	Friends (150)	Yearly	January	Before January	Kids Ava (5) and Leo (2)	Telegram

How to use it:

• Sort by “Next touch by” during the weekly review.
• Keep the “What’s going on” column short and dated. “Interview Thu 9 Oct” is more useful than “job stuff”.
• Set recurring reminders only for the core and close circles. Reminders for 150 people become noise you’ll learn to ignore.
• Don’t track everyone. If someone is in your life daily (a partner, a flatmate, a coworker friend), they don’t need a row.

What to do when you’ve already drifted

Send one short, specific message and expect it to land better than you fear. You don’t need a long apology or an explanation of the gap. Our guide to texting an old friend after a long time has example texts for different situations.

Psychologist Peggy Liu and colleagues ran a series of preregistered experiments (published in 2023) showing that people consistently underestimate how much others appreciate being reached out to. The gap was largest when the contact was more surprising and when the two people were less close, which describes exactly the friend you haven’t spoken to in two years.

A reliable shape for a reconnect message:

1. Name the gap lightly. “It’s been way too long.”
2. Point to something specific you share. A memory, an inside joke, something you saw that reminded you of them.
3. Ask one easy question. Something they can answer in a line.
4. Offer a small next step, or none. “If you’re ever up for a call, I’d love that,” or simply nothing.

Example: “It’s been way too long. I walked past the noodle place on Elm Street today and thought of you ordering the extra-spicy one out of spite. How are you doing these days?”

If it’s a close friend and the gap is long, consider calling instead. In the Kumar and Epley field experiment, people reconnecting with an old friend by phone felt more connected than those who emailed, without the awkwardness they expected. For more scripts sorted by how late you are, see what to say when you forgot to text someone back.

Keeping in touch when life gets full

When work, a new baby, a move or illness takes over, shrink the system instead of abandoning it. Keep the core rhythm and pause the outer circles without guilt.

Situation	Keep	Pause or simplify
New job or crunch period	Weekly contact with the core five, even a voice note	Good-friends and yearly touches move to birthdays only
New parent	Short voice notes, photos, “no need to reply” messages	Plans that need childcare; let friends come to you
Moved city or country	Monthly calls with the close circle at a fixed time	Group plans back home; a visit list instead
Low mood or burnout	One or two people who know what’s going on	Everything else, temporarily, and tell people you’ll be quiet

Telling people helps: “I’m going to be bad at replying until March, I still love you” protects the friendship far better than silence. If distance is the issue, our guide to maintaining a long-distance friendship covers time zones and rituals in detail.

Tools that help (and what each can’t do)

You can run this whole system with a notes app and your calendar. Tools only help if they save you the remembering.

• Calendar and Reminders. Recurring events for standing calls and repeating reminders for your core people. Free and dependable, but they don’t know whether you actually talked.
• A spreadsheet or Notes. The template above. Flexible, but you have to update it by hand, and it’s easy to let it lapse.
• Personal CRMs such as Dex and Mesh. Reminders, birthdays and notes per contact, strongest for professional networks synced from email or LinkedIn. We compare them in keep-in-touch reminder apps.
• Tera Chat (our app). Instead of a separate list you have to maintain, it works from the chats you already have in iMessage, WhatsApp, Telegram, Instagram and Tinder, on your Mac. You can group people into circles and set a keep-in-touch goal for each circle (Influence → Circles and Goals). It flags fading chats before they go cold, scans each night for missed cues such as a question you never answered or news you never reacted to, catches birthdays, new jobs and moves from your chats with one click to Calendar, and sends a short weekly digest every Sunday morning about who’s drifting and who to message. The app is free, and circles, goals, fading-chat alerts and missed cues work without any AI set up. Life events and the digest need AI, which can be your own ChatGPT account (through OpenAI’s Codex), your own Claude or Grok API key, or a Tera Chat AI plan.

What Tera Chat can’t do: it runs only on a Mac with Apple silicon and macOS 15 or later, it doesn’t connect Signal, Messenger, email or LinkedIn, and it only knows about the friends you talk to in the apps you connect. It can’t tell you that you haven’t called your gran or seen your neighbor. Treat any tool as a prompt, not a replacement for showing up.

Your first week

Keeping in touch as an adult comes down to a small number of habits done consistently:

1. Today: brain-dump names and pick your core five and close ten.
2. This week: send three specific messages and put one plan with a date on the calendar.
3. Every Sunday: run the 15-minute review using the template.
4. Every few months: re-sort your circles and look up the people in your yearly circle you haven’t heard from.

If you want to go deeper, how often should you text your friends looks at texting rhythms by closeness, and our friendship and loneliness statistics page collects the sourced numbers behind this guide.