Sounds like karma once... now a second shot? Would you trust yourself with what you're expecting of her?
I hate to say it but i think your setting yourself up for failure. Unless she goes to the same school as you you wont be seeing her much which is pointless. Also dont you think she is a little crazy if she jumped out a window after you broke up?
so you fucked other girls while you were broke up and she fucked other guys..whats the big deal? get over it or don't that's up to you..but if you can't get over it then you're wasting your time.