Is she diagnosed/under treatment from a Psychiatrist?

I think it's important for you to take care of yourself and honor your own feelings. If you're having these issues after only 3 months of being together, she's probably not in a place to be in relationship.

For myself I had a relationship that we did the break up/get back together dance. Looking back on it my undiagnosed BP played a part in it, but underlying that was I knew he was someone that wasn't healthy for me.