Bipolar disorder doesn't automatically mean violence at the flip of a switch. She could have any number of mental illnesses, or a brain tumor, or just a really bad case of PMS.

We can't diagnose her over the internet, or by snippets of information we received from a concerned third party. And, until she seeks help, she isn't going to get a definitive diagnosis, let alone treatment for that diagnosis.

And although I am under treatment and take quite the cocktail of medications to manage my symptoms, I still lose my temper and sometimes I even lose my mind. And I do not have Bipolar Disorder.

After reading some of the other comments I'm inclined to agree that you will never have any kind of meaningful relationship with this woman based on her blatant disregard for the truth. And if she would lie about being abused, what else would she lie about?

Best to steer clear of this one.