I'm in the process of getting over a relationship and reflecting on what went wrong. When we first broke up I was devastated because I went from being the best thing since sliced bread to being unable to do anything right in a short space of time. Now I've had some space and time to reflect, I've realised that he has history of doing the same thing (we were friends before we got together) and 2 other exes who he adored but who suddenly became 'wrong'. He's now got a new girlfriend who he seems to be in the same cycle with.
I've never encountered this kind of behaviour before and wonder if it fits with some kind of personality disorder. My main reason for asking is because my self-esteem took quite a battering towards the end of the relationship and it would help to know that it was actually nothing to do with me.