I found out a couple of months ago that my boyfriend of almost a year had been cheating on me with another girl pretty much the entire time we were together. While he had been dating me, he mentioned this other girl on numerous occasions, but in terms of her being an ex-girlfriend. He told stories about her and details about her personal life to me. I found out that not only was she NOT his ex-girlfriend, she had been dating him the entire time I had been dating him, and even a little before. When I told her about me through a text message, she had no idea who I was. We spent almost an entire day exchanging texts, with her asking me about our relationship, how we met, when we would see one another, and how I knew about her (I told her he talked about her in the past tense and said very nasty things about her). I told her who I was because I didn't want her to live a lie like I had been living and to get hurt like I had gotten hurt, and I made sure she knew that I was on her side. I told her that he was very good at lying and was emotionally manipulative because he had manipulated me very much. Much information was revealed, including how he told the both of us that he loved us and wanted to marry us. I also forwarded her many of our e-mail exchanges over the months as proof of our relationship. But after that day of confrontation, I never heard from her or my ex-boyfriend ever again. I've attempted to e-mail her once to ask her if everything was ok, but she never replied. It has been more than a month now since we spoke. Now I'm wondering... what exactly is the mentality of a girl who just found out, after more than a year of dating someone, that her boyfriend had been cheating on her almost the entire time? Is she angry at herself? At the other girl? At her boyfriend? Would she really leave him that quickly, or would he succeed in manipulating her into staying? And is the reason why she won't respond to my attempts of contact because she is angry at me for telling her? I really did have good intentions... I was just wondering if anyone had ever been in this situation or heard of anyone being this situation. It seems like it would be very easy to be manipulated into staying (especially if you are in love), but I'm not really sure what to think. I just don't want her to think that all I wanted to do was hurt her. I just couldn't bear the thought of another person going through this horrible situation the way I did.