Allright--here is the thing..you love her right? I was in the same boat as you just that my wife had been diagnosed with bipolar, but some of the actions and patterns are similar.
I think I made my decision to stop blaming her and stop reacting to the abusive behavior too late. Try to get her to go to counseling with you, it creates a safe environment to discuss the relationship. If you really are "over her" -- run. If not --fight for her. Educate yourself, treat her with respect and expect nothing back. With proper treatment your relationship may be saved, try to take care of yourself as well, threats don't work, they often backfire. I wish I would have been smarter, not so arrogant, more caring and less selfish and I could have saved my marriage and helped myself and my wife to live a happier, more productive life. Good luck.