Maybe if you try thinking about why you fell for her in the first place, it might help you. You stated:

“She is also the type of woman that believes all guys want her because, well, she is pretty attractive, so she plays the naive/victim card when a guy she has met or one of her friends ends up liking her. In reality, she probably just flirts but doesn’t accept it.”

Men put beautiful women on a pedestal- this society is obsessed with beauty. Whether it is for evolutionary/biological reasons, men sometimes choose a beautiful woman mainly because she is beautiful. If she is somewhat nice, they drool over themselves and think she is in love with them. We women know this, consciously or not, and let’s face it, life is about survival- many attractive women use their looks for financial gain and security. Look at Melania Trump. Just sayin’…so don’t fall for it when a pretty girl is nice to you. If she is treating you like shit, but you are still fawning over her, it’s on you, my friend. She clearly liked you, but she didn’t feel passion/love with you, but you comforted her and she didn’t want to lose that. She wanted friendship with you, but she knew she could not have that without sleeping with you/pretending to love you. Honestly, I’ve done it myself in my past. The power we have over some men is hard to resist. She finally did you a favor, and she let go. Time for you to love yourself and eventually find a woman who feels for you what you feel for her. All the best.