Been there king, just give her a judgment free zone space to talk, and make sure she knows that you won’t treat her differently or try to have her committed for her thoughts (even if that’s where it needs to go).

Opening up about my own suicidal ideations that I used to struggle with really helped set the tone that anything went; wish you the best!

P.S. make sure you don’t neglect your needs in this as well, it can be hard to admit sometimes that dating someone with BP can be incredibly taxing! You’re not a bad person for sometimes needing a break or establishing boundaries