What you describe in his thought patterns is very similar to someone I know. Perhaps alcohol, does exactely the same thing to many of them. He also tells his girlfriend how sorry he is all the time and he never stops saying he is sorry. But I think he feels most sorry for himself. Every little thing he can come up with that would make him feel sorry for himself is a reason to start drinking again. He also wants other pretty girls all the time, but it is the excitement he is looking for I think and to run away with them in a fantasy world. Sex is probably the most important thing in his life now and he watches p 0 r n secretely all the time, everyday. It is not that his girlfriend is not pretty, and it not that you are not pretty either. They are just too stupid and wasted to realize why they are cheating and that is what you ex came up with. So stop thinking about that stupid remark, it is not true. I am glad you got away from him.