Oh no, I'm so sorry. This sounds like a rough period. Can I offer hugs?

And it's understandable when you need to walk away from a relationship when continuing it would just dangerous for your health. There are other people, who have resources available, who can help her. It will be okay.

This may sound stupid, but I learned a trick from a movie that honestly made me feel better, so I will offer it to you. Put your hand over your heart (as though you were saying a pledge), pat it gently, and say to yourself, "All is well."