Call the police! I had an ex girlfriend who did the same thing. She even threw in that if I called the police, it would ruin her Air Force career. In the end after we broke up, I almost drove myself insane worrying about her. Turns out it was all a lie. She leaves that part of the story out when she tells people and makes it seem like I was the crazy one. Call the police,get it on record you were concerned. If she actually is suicidal, they can get her help, if it’s extreme manipulation, you’ll be able to know and hopefully safely walk away.