I would be suspicious of the ex, if I were you. She might be playing the game, trying to scare you off. I'd try to stay away from her, in every way possible.

Yes, it's tough to be with a bipolar. I hope your meds get dealt with soon.

Does he know your diagnosis? It would help. If he really cares for you, then maybe he would be willing to read about it.

But if he doesn't stay with you, then try to think of it as for the best. His ex sounds like a real trip. She could be a continuing problem, methinks.

I would encourage you to talk to your therapist about this situation.