Just don't internalize what she's done. People have their own reasons for doing what they do. It's not about you. It's about her. Her reasons for doing this have NOTHING to do with you. So don't internalize it. I know it hurts. Bad. Let it go...hard as it is...let it go. We're more than willing to forgive others and love them...we ought to be AT LEAST that willing to forgive ourselves and love ourselves! Do it.
"Always go straight forward, and if you meet the devil, cut him in two and go between the pieces." - William Sturgis, clipper ship captain, 1830's.