I recently read the book "Loving Someone with Bipolar Disorder" by Julie Fast. Ask your girlfriend to read it. One of the things it emphasizes is that to be a good partner to someone with Bipolar, you have to take steps to be a stabilizing influence for them, not a destabilizing influence. Your girlfriend seems like a very destabilizing influence for you. Maybe she can take steps to be a better partner to you, but maybe this is just how she is. If that's the case, then you're probably better off moving on. I'm sure you care about her deeply, but if she undermines your stability by intentionally provoking you, then she is not a good partner for you.