Hi whiteycm,
Don't trust her. First love is
always painful in the end. The inexperienced and hopeful side of yourself is willing to give more chances than the part of you who has been down this block before. Unfortunately, it is so painful. I remember!
The important lesson for you to learn is that not all women behave that way. Perhaps your ex
has worked upon her issues, and bettered herself. I hope so, for her sake

. But it really would be a BIG mistake
for both you and her to become involved again. You need to let go, in order to get past the pain and tendencies.
Best wishes to you both - take care
Shez