Rob--about that girl who gave you a bad number, don't give it a second thought. The reason she did that wasn't because you're not a cool guy, it's because she's a bitch. Plain and simple.
It might be possible to "win" your ex back, but it won't be anytime soon, and I have to ask, why would you even want to? I know you still care for her, but try looking at it from a logical standpoint. She's not worth it man.