... it's hard to acknowledge that it's time to move on, that you aren't in front of the same person you were about 3 years ago, and probably you aren't the same person either.
You'll try, if you care enough you'll do it not only for you, but because deep inside you know that you still care about that other person, because no matter how bad the situation was, because no matter how things are going to end, old friendships always make you care more about others.
Sometimes it isn't about errors or mistakes, sometimes life leads you to different places, each one of us choosing different routes, each one of us choosing different paths and those decisions are the ones drifting us apart, making the differences seem bigger and bigger.
And then the question is, how do you talk about it? how are you sure that there's nothing else in there for you or the other person? how do you avoid hurting the other person's feelings?
You can always sit down and wait around until you see the lasts bits of you friendship drain away, not do anything, even avoid the subject, watching how each time that you see each other there's going to be less to talk about, you are going to have less in common.
Then at some point the calls are going to stop, that person is going to move on or you are going to move on, finding someone with who you seem to have a lot more in common and that place is going to be filled with someone else.
It's hard to let someone go and it's even harder to see someone go away but sometimes it's all you've got left to do and once you do it there's no going back, because once you leave someone's life, unless the other person is okay with it, there's no way you can get back to it.
I rambled a lot, my mind was in a bad place when I was writing this but the pain is there. Seeing one of my close friends go is hard, mostly when you have gone through pretty rough things together, but it's time, for our own good at least, to continue out different ways and maybe someday, somewhere we will reunite and life will be better for both of us.
You can't hold someone down, but you can help them fly away even if that hurts you.