Why Adult Friendships Fade (And Why It’s OK)

Most people don’t talk about this, but adult friendships fading can really mess with your head. You start wondering if you did something wrong. If you should have tried harder. If you’re a bad friend.

And the truth is… most of the time, it’s none of those things.

Today, I want to talk about something that’s been on my mind a lot lately — the ebb and flow of adult friendships. The way people come and go from our lives over time. Some you slowly lose touch with, others you barely hear from anymore, and some just disappear completely. And if you overthink it too much, it can really start to impact your mental health.

Why do Friendships Fade?

I used to feel guilty about it. Like I was a bad friend or something. Until I came across this poem called The Train of Life. It’s a beautiful metaphor about how people board and exit the train of our lives at different stations. But for me, it never fully captured it. Maybe that’s because I’ve moved so many times, met people all over the world. I don’t think it’s just one train. It’s more like a whole rail network — different lines, different directions. Some people ride with you for years. Others are only there for a short time before switching tracks. And sometimes, you’re the one who decides to get off.

I remember being younger, sitting in school thinking, “these are my people.” The same faces, the same jokes, the same routines. You just assume they’ll always be there. And then one day… it ends. No big moment. No dramatic goodbye. You just stop seeing each other. Some go to university, some get jobs, some stay put, and some just drift. Before you know it, you’re all moving in completely different directions.

The same thing happened in college. New people, new conversations, new routines. It felt like I’d found my place again. But even there, everything was shifting. Friendships formed quickly… and faded just as fast. Some stayed, many didn’t. Then came my first job. Walking in not knowing anyone, not knowing where I fit. Slowly, conversations happened, people sat next to me, connections built without me even realising it. For a while, it felt like home again. Then I moved jobs. And this next one was different. I stayed there for eight years. The same people, the same routines, the same shared experiences. They became more than colleagues — they were real friends. That place became part of who I was. So leaving wasn’t just about the job. It was about the people… the memories… and the version of myself that existed there.

And then I left Ireland altogether. At the time, it felt like a big step forward — freedom, opportunity, something new. But what I didn’t fully understand was this: I wasn’t just stepping onto a new path… I was leaving an entire network behind. People who were a huge part of my everyday life became calls… then messages… then less and less. Not because anything went wrong, but because our lives were moving in different directions. And that pattern just kept repeating. Singapore.
Hong Kong. Canada. Each place — new people, new rhythms, new connections. The same cycle. You arrive, you build something, and then something shifts. You leave, or they do. Life moves.

Honestly, I’ve been on a lot of trains. Some incredible journeys. Some not so great. And a lot of times… it was a choice. Because for me, there’s only one life. And I want to experience as many versions of it as I can — different people, different places, different perspectives.

It Doesn’t Mean the Friendship Wasn’t Real

But here’s something I wish I understood earlier: Just because someone is no longer in your life… doesn’t mean they weren’t important. We’re too quick to dismiss it. “Oh, we lost touch.” As if that makes it meaningless. But it doesn’t. Everyone you meet matters in that moment. They were part of that chapter, that version of you. Some made you laugh when you needed it most. Some supported you. Some challenged you. Some taught you lessons you didn’t want to learn. They all mattered. And they still do — just in a different place in your life. Because friendship isn’t about who stays forever. It’s about who mattered when they were there.

And then life teaches you something even harder. Not everyone leaves by choice. Some seats don’t empty… they disappear. And that changes how you see everything. You stop taking people for granted. You start noticing who’s sitting beside you right now. Some people stay in the same place their whole lives. Same town, same environment, building roots, family, stability. And there’s something really beautiful in that. Others move. Different countries, careers, directions. Some settle down early. Some don’t. And suddenly, you’re not on the same path anymore. Not better. Not worse. Just different.

And if you understand that, you stop trying to force things to stay the same. You let people be where they are, you let yourself be where you are. You let go of needing that one “best friend” or “forever person,” because maybe that role changes across time, across trains. It doesn’t make it less real, it just makes it honest. Friendships change,  people come and go, all on different platforms, different tracks, different trains and theres nothing to stop you from taking the subway back and catching up on the good old times through a call or simply a pint.

So maybe the goal isn’t to hold onto everyone. Maybe it’s to move through life well – to appreciate the people who are there right now, to value the moments you share, to respect what was without trying to force it into something it’s not anymore. Not everyone stays on the same train. But the network remains. Different trains, still connected in some way.

And maybe it’s worth thinking about your own network for a moment. How many trains have you been on? How many people have come and gone? Which ones lasted years, and which were only short but still meant something? And which ones are still there quietly in the background, the ones you could reconnect with at any time?

Because when you look at it like that, it starts to feel different. It’s not about losing people – it’s about movement, it’s about the journey. Maybe it’s about who’s here right now. Because here’s the real question: Who is sitting beside you right now that you’re not fully present with?