Can you control jealousy and resentment?

Asked by Lothloriengaladriel (1555) October 27th, 2010 from iPhone

My fiance cheated on me pretty bad in the beginning of our relationship, he was basically dating his ex long distance the first year we were together and seeing her when she would come into town. I made a choice to forgive him please don’t judge me but we have a daughter now and he’s changed 100% and you would think I’d be happy, though I have a problem; that being that I can’t seem to forget the past and manage to bring up his ex at least once a day, it’s almost like I’m obsessed with her is how it feels because I just feel so jealous of her that he chose her over me but it never leaves me and I’m always mad at him about it like how could he of done that to me while I was carrying his child. I’m just explaining what I feel but my feelings are affecting our relationship in a very negative way and I just want to be over this and be happy with him and move on from this. How can I move on and forget the past?