I ended my relationship in July, after finding flirtatious messages between ex and a close friend of mine. It wasn't the first time he'd done something like that, although I don't think he ever physically cheated. However, I couldn't take the sleazy online behaviour, as it was coupled with ongoing problems over his intense jealousy and controlling behaviour. It was a very oppressive situation, which made me unhappy.
Ex has no coping mechanisms whatsoever, and has sunk into a spiral of despair, particularly over christmas. I don't want to feel responsible for him, but I feel an ache when I think about him feeling so bad. He thinks that I have taken everything away from him, over trivial mistakes. He doesn't understand the bigger picture, or pretends not to. We have one child. He has effectively lost his house, car, and a live-in relationship with his child. I don't want to be with him, but I feel so dreadful about his situation. I should add that I have gone to endless lengths to support and encourage contact between him and our child, and am selling the house as quickly as possible to split equity 50/50. So I don't feel I am 'taking everything away from him'.