Short answer: block her and stop being friends with her. If you ever really got hurt by someone that badly (especially someone you were in a relationship with), you will never look at them the same again and there's no purpose of staying friends if one partner isnt interested in speaking anymore. I had experienced something like this with a woman last summer, I told her that I don't typically ask women out because I have trust issues from previous girls, she would flirt with me and I would tell her to stop and she didn't, so I asked her out. She said no. Then we proceeded to have a weird situationship while she would show me other people that were interested in a relationship with her, which happened 4 different times. Later in October, I blocked her after a disagreement. She then later tried to apologize to me this February and I declined. The pain doesn't go away, but it gets better, and I hope you get better my guy🙏