Why you ask?
the only thing that came to my mind was they tend to stick to their own kind.
you may never find the answers, I understand your frustration, and pains. You need to think about you.
The person you loved is not there anymore. Something has taken her over. She needs to find her own way out. Nothing you do or say will change what she will do.
I know it is hard to let go, be grateful you are getting your life together.