To me it sounds like borderline personality disorder. One of the hallmarks is stormy releationships and idealilizng and then demonizing people. Loving someone, then pushing them away and hating them and then loving them again. Difficulty in maintain long term releationships is another common issue. Wreckless behavior such as drug abuse, wreckless driving, spending, eating disorder etc.

I think you should cut your losses and move on. It sounds like she has. I don't think you can fix her, she has to want to improve her life and you are looking for anguish if you try to be her saivor.