Friends who push you away when they've got problems, wont speak, say nothing's wrong when you ask. You know there IS something wrong but accept that perhaps they just dont want to tell you, need space or aren't ready to talk about it. Now this all fine, everyone copes in different ways.
Just don't come to me years afterwards and tell me that i'm a shit friend, wasn't there for you etc, or post passive aggressive memes on fb on how you are fine alone because noone was there for you when you needed them, despite the fact you didn't give two hoots about me when my mother died, but our mutual friends dont know that bit, because I don't complain on there.
People like this are just such hard work and i'm fed up with it. My friends know how much I care about them, they only need to tell me what's wrong and i'll try to help but i'm not a mind reader. Somehow i'm always left feeling like shit, like I didn't do enough.