My girlfriend, now ex-girlfriend, has lied about a one-night stand she had while we were at the beginning of our relationship (texting phase). In the past I had bad experience with lying in my relationship and she knew it. Everything she told me about this guy was a lie. She also did more sexual stuff in the past with the same guy. That’s one of the reasons I had to end the relationship. I thought it would help me being away from her but it’s eating me up. I hate my self for breaking up with her, but I also can’t forgive her. Sometimes I hate her that much and 2 minutes later I want her back. I know I have to get over this but I just can’t get the image of her having sex with him and lying to me about it. I feel so embarrassed of myself, because I trusted again and got hurt again. I can’t stop cutting myself and don’t have a way to cope with this bullshit.