<human>: My ex-boyfriend [M24] cheated on me [F24] for the 4 years we were together with chatroom sex, strip clubs and prostitutes. In that time we broke up and then got back together after he convinced me he had changed through 6 months of therapy and I fell in love with him all over again. Yes, I made a huge mistake. We were happy for a time, but then he left me for another woman. It has now been 4 months since he left, during which time I have been trying to build myself back up, focusing on work, taking up new hobbies and spending time with friends. I have even been on dates. But every day is a struggle. Upon a momentary weakness and cyber stalking I see him and the other woman are starting to get more serious and it devastated me all over again. 

I'm not a fool, I know I just need to get on with my life and I am better off without him, but I can't stop the burn of desire for revenge. Every other minute today I have been stopping myself contacting her in the attempt to break them up. It is all consuming. I know this is wrong and I should be the bigger person, but the feelings are very strong. I also know that I have a very unhealthy infatuation for him when all he gave me was pain. I hate that after everything he has done he is happy and I am still struggling. He manipulated and played me for so long and has completely altered everything that made me who I am.

Can you condense the text into three sentences or less?
<bot>: I burn with revenge against my ex's new relationship after years of being manipulated and lied to. Help me see sense!