This has happened a few times before, but I'm curious if it has happened to anyone else here. What if you were good friends with someone, got along well, never argued and always said kind things to each other....then the friend suddenly starts to ignore you, talk behind your back, be negative towards you, etc. And to your knowledge, you haven't done anything wrong. Then when you confront the person on it, they say nothing has changed, that you are just paranoid or they still keep ignoring you. Why would someone do this? And if it's happened to you, how do you deal with it?