OP, it sounds like it was toxic relationship.

I was in the same boat not so long ago..I loved her and hated her to the extreme. Was a kind of relationship that I've never had before. When we broke it off officially, she started dating someone new within a few months..I was like "That bitch! I'm the only one she can be with!"

You then begin to realize that women have a shelf life. They need to get what they want in a timely matter, otherwise they will grow old and have 17 cats and no man. Men on the other hand don't think like that. We can be in our 40's and score 20 somethings. Don't take what she did personally. It's strictly business.