That is pretty effed up. She is obviously emotionally and mentally unstable.
Just be glad that she is out of your life. It doesn't sound like she made you happy and has done a great job a making you miserable. What good is that?
Everyone gets hurt in relationships, unfortunately,whether or nt they have happy endings. Maybe you haven't found that right someone to get serious with again. What can you do, but get up, brush yourself off, and try again.