You were wrond to cheat twice. Now she is doing the same thing. Maybe she is trying to hurt you because she never got over it. Why else would she be throwing it in your face. Unless she is just plain evil. It is hard tothink of someone you love, so with someone else, so try to avert you thoughts as quickly as possible when your mind starts down that road. I know it is hard. Maybe you could try saying you know she feels she has to do something (whatever it is she is doing) and then back off and let her do it. Try to limit your interactions with her. Try being cheerful but not desperate. You really cannot change a person, but you can change yourself and see how she reacts.
There is always hope if I'm responsible for my own behavior.
