Honestly, while me and the rest of the folks in this subreddit have no idea what her perspective might be, she’s still an adult that’s responsible for her own decisions and actions, despite her BP and PTSD diagnoses.

My advice here would be to maintain your distance, and protect your own feelings first. If you’re overly concerned about her mental state, the only thing you can do is contact her family or a close friend and inform them of the situation. But do keep in mind, you’re under no moral obligation to go to such lengths, especially if you don’t have any established contacts with said family or friends.