I would end things with this person. She sounds very unstable and should be on medication and in therapy as well. She is threatening suicide and is making it your fault. Too soon for such intense and deep problems. Very sorry you're in this situation. You're not responsible for her medication and stability. She needs to take care of all of that herself. She's not even self aware enough except to say that she doesn't want to be your next abuser. Definitely far too soon for such enormous issues.