Here’s an enormous life lesson that took me decades to learn: you cannot take responsibility for anyone else’s happiness. If she is truly a danger to herself, this is usually mandatory reporting territory depending on your local laws. Act accordingly.

If you’re suddenly feeling your connection to humanity above and beyond getting laid, here is some basic info on what you can do: https://www.nami.org/relationships/how-to-talk-and-listen-to-someone-experiencing-suicidal-thoughts/

No luck stat? Because we all tend to underestimate how much luck plays into everything.