How to write a letter to your best friend (and what to say)

A letter to your best friend needs one memory only the two of you share, one thank you for something specific, and a few honest lines about what your friend means to you today. Write it the way you talk to each other, keep it to about a page, and finish with something you are both looking forward to.

An example: Rosa bought the card three weeks before June turned forty. It sat blank on her kitchen table while she typed first lines into her phone and deleted them. "Happy 40th to my bestie" sounded like a card from someone at the gym. "I don't know what I'd do without you" was true, and it still sounded like a slogan on a mug. They had been friends for nineteen years, ever since June knocked on her dorm room door to borrow a can opener and stayed talking until two in the morning. Nineteen years, and Rosa could not fill one small card.

Three things to gather before you write

Spend ten minutes collecting material before you try a first line.

1. One memory. Small and exact works better than big and vague. The can opener night says more than "all our adventures."
2. One thing to thank them for. Pick something they did, ideally something they never knew mattered. The ride to the airport at 5 a.m., or the week they called every evening after your breakup.
3. What they are to you now. Describe the friend they are this year, as an adult. The first person you call with news, the one who makes you braver, the one who knows your whole family history and likes you anyway.

With all three, the letter gets much easier.

What to write in a letter to a friend

A friendship letter has a loose shape. You don't have to follow it exactly, but it keeps you from staring at an empty page.

• Open with the name you really use. "Junebug," "Hey you," or just "June." A formal greeting makes a best friend feel like a pen pal.
• Tell the memory as a little scene. Where you were, what someone said, what made you both laugh. Two or three sentences are enough.
• Say thank you once, and mean it. One real thing lands. Ten thank yous in a row start to sound like an awards speech.
• Say what they mean to you. This is the part people skip, and it is the part your friend will read twice.
• Look ahead. The trip you keep promising each other, dinner next month, the next nineteen years.
• Sign off like yourself. More on that below.

Sample paragraphs for four kinds of best friend

Borrow the paragraph closest to your friendship, then put in your own names, places and jokes. Your friend will spot a copied paragraph at once.

The steady one

"You're the person I call when the car breaks down and when the news is good, and you answer both calls in the same calm voice. Last March, when I moved apartments in the rain, you turned up at eight with two coffees and a roll of tape and stayed until the last box was inside. I want you to know I notice. My life feels steadier with you in it."

The funny one

"I still can't walk past a goose without thinking of that afternoon at the lake. You laughed so hard you had to sit down in the wet grass, then I laughed at you, and the goose took the sandwiches. You find the joke in my worst week and hand it to me like a present. Thank you for every voice note that made me snort on the bus. I've saved all of them."

The far-away one

"It feels strange to write when I could just text, but some things deserve paper. I miss our Tuesday walks most. I miss you tapping on my window instead of calling first. Three time zones away, you still know something is off before I say a word. Thank you for every call you squeezed in before breakfast or after midnight. When you visit in June, the first coffee is on me, and so is the second."

If you're the one who stayed behind, long distance friendship has ideas for the months between visits.

The one you rarely tell things to

"Some friends hear everything. We've never been like that. We talk about films and your dog and your terrible taste in pizza, and that suits us both. So I'll say this once, on paper, where it's easier: you matter to me more than I've ever told you. The month my dad was in the hospital, you didn't ask a single question. You just kept inviting me out, and it helped more than you know."

When the hard part is finding one right word for them, words to describe a friend sorts adjectives by the kind of friend they are.

Letters for a birthday, a move or no reason at all

A birthday letter

Use one memory from the past year, a thank you and a wish for the year ahead. For a round birthday, compare then and now: who they were when you met and who they are today. "At twenty-one you wanted to live in Paris and own a boat. At forty you own a very nice bike and you live ten minutes from me, which I think is better." If a few lines in a card are all you need, try these birthday card wishes for a friend. If your best friend is getting married, the same memory-first approach works for a maid of honor speech, only spoken and shorter.

When your friend is moving away

Write it before the goodbye and give it at the airport, or tuck it into a box they will unpack in the new place. Name exactly what you'll miss, then make one plan, like a date for the first call. If one letter feels too small for the change, a set of open when letters gives them something to open on the hard days in a new city.

A just because letter

A letter with no occasion can land hardest, because nobody expects it. Keep it short. "I was thinking about you today because the bakery on Fifth finally made those almond buns again." Then one line about why you're glad they're your friend. Then mail it, because a handwritten envelope in a pile of bills is a small event in anyone's week. Parents rarely expect one either, and a letter to your mom or dad can land just as hard.

How to end a letter to a friend

End with something to look forward to, then a sign-off that sounds like the two of you. A few that work:

• "See you in June. Bring the bad snacks."
• "Love always, and I mean the always part."
• "Your partner in terrible karaoke."
• "Still yours after nineteen years and one can opener."

Sign with the name they call you, even if it's silly.

Why some friends cry at a letter and others text back a joke

Send the same page to two friends and one calls you in tears while the other sends a thumbs up and keeps the letter in a drawer for a decade. Personality type is part of that. Here is how six types often take a letter, in the order of the types page:

• Harmonizer: notices the paper, the handwriting and the doodle in the corner. Mention a cozy shared moment, like a meal or a favorite café.
• Vitalizer: may read it aloud to whoever is in the room. Put in a funny story and plenty of warmth, because they enjoy a fuss.
• Mentor: might cry by the second paragraph. Tell them how they changed you, since feelings put into words are what they treasure.
• Inspector: trusts plain, true lines over big ones. Thank them for a concrete thing they did and leave out the superlatives.
• Strategist: reads it twice, says little, then answers a week later with a few careful lines. Mention something you learned from them.
• Craftsman: may never bring it up and will still keep it in the glove box for years. Short and specific suits them best.

June turned out to be the reading aloud kind. At her birthday dinner she stood up with the card, got through the can opener story laughing, and stopped at the last line because her voice went.

A P.S. that starts the next conversation

A postscript is a good place for an invitation: ask your friend to find out with you what kind of friendship you have. Your two types explain a lot about how each of you takes a letter like this, and the free friendship compatibility test shows yours. Write the link from your result under your P.S. When your friend has done it too, you can both open your relationship type, a page on what comes naturally to your friendship and what tends to rub.

Questions people ask

What should I write in a letter to my best friend?

A memory only the two of you share, a thank you for one specific thing, a few lines about what they mean to you now, and a plan to look forward to. Write it in the voice you use with them.

How long should a letter to a friend be?

One page is plenty. A short letter with one true memory beats a long one full of general praise.

How do you start a letter to your best friend?

With the name or nickname you actually call them, then straight into a memory or the reason you're writing. Skip formal openings.

Is it weird to write a letter to a friend for no reason?

No. A letter with no occasion can be the one people keep longest, because it was clearly written just for them.

Written by Virko Kask, founder of Typeza
Written with the help of AI tools.