A girl who cheated on her current boyfriend with me (I didn't know so don't judge me) and who I broke up with when I found out just invited me to her birthday.
I must be the nicest guy on earth.
That is just terrible. Cheating on some poor fellas girl, that's bad and stuff. Is she hot? I mean we all make mistakes, some mistakes hotter than others.
I'd say go but be careful. Is she still with that guy? Is he the kind of guy who would have her change her FB status and invite you to a party so he can beat you up? Just stuff to think about.