I agree with the above, in my experience true close friends are few and far between. I used to get sad because acquaintanceships would fizzle out, but I now realise they weren’t meant to be. That’s okay. Doesn’t mean anyone is at fault, just not compatible for close friendship.

That’s not to say we shouldn’t reflect at all when someone drifts out of our life, there might be things we can learn from. It’s rarely one persons fault though.