I would leave since you were so adament to stay in the first place. Honestly, you can't make her do anything unless shes a danger to herself, and then you can call the cops. I think she was emotionally scarred from her divorce which triggered this. Divorce is stressful for anyone and rarely easy to cope with. She may/may not have bipolar and this could possibly be her only episode. (Episodes arent always short) Ultimately, you have to decide how important this relationship is for you.