Yes, it is possible that sometimes, despite what I keep harping on about, friends can completely and without a fucking care in the world, break you. No, wait. Make that destroy you.
See, the thing is, you get used to having friends around no matter what. To misappropriate one of The Huffington Post's headers I believe that "Boyfriends may come and go, but friends are forever" ("Marriages come and go, but divorce is forever" is the original). When even a friendship cannot withstand the flux that is life and circumstance, it is damn near impossible to believe that anything can be right with the universe. How can it be when the people you trust blindly are themselves incapable of courtesy?
It bothers me that the people you expect the most from are the last ones to live up to them. I mean, family, as I've said before on this blog, has it's own agenda. However, friends are people you assume a certain truth and honesty with, and when that openness is taken for granted, it seems to me that there is something fundamentally wrong.
How is it that you can be selfish with a friend? Is it because you know that this person is not going to bring it up and confront you with it? Or is it that you have gotten away with far worse in life otherwise? Whatever it is, the reason and the reasoning are wrong.
I could keep going on and on, but it will all boil down to this, sometimes in life, you're the only person you can trust and expect highly from. The rest of the time, if the situation calls for it, it's best to keep a distance and STFU.