Sing her this:
http://www.youtube.com/watch?v=4GuqB1BQVr4
Works like gold, trust me dude..
Ok, I'm just kidding don't do that.. first of all, she is not the reason you are getting hurt.. YOU are the reason why you are getting hurt.. It's your reaction that counts and affects you, not what happens to you by an external cause..
My advice to you is to game others girls and move on.. This outcome will always be the same if you are the always going to be the same.. How to change? well, where shall you start? what are your sticking points ? Work on them.. Be your better self and score better girls that deserve you.