worried about my partner

She reads this subreddit so I have to be quite vague. She left me abruptly and cheated on me. This is very weird as she’s normally very empathetic and caring. We have been doing well so this came out of nowhere. She has used money impulsively, suspected over 1000 dollars. She has bpd, not diagnosed with bipolar, but this is clearly some kind of a manic episode. This hasn’t happened before. I’m very worried and feel helpless. I can’t help her. She needs to want help themselves, but she’s totally blind about her situation. I have called mental health services many times but they can’t do anything unless she’s a danger to herself or others. The system is so broken. Any stories of experience or reassuring words are very much appreciated… Thank you for reading.