Someone I know is fairly suicidal, and I know that it usually pops up in response when one relationship she has is in jeopardy. But she'll never outright say it, she will make up some other reason why she's been taken to that point and I have caught her in lies. I noticed the pattern and decided to confront her on it yesterday because her life is starting to be ruined. I said "I think this is the real reason why you've been feeling this way and I want you to know you're not alone. But I think that you need to talk to this person about the state of your relationship rather than get to this point, because it's starting to impact your life and not in a good way." She got super duper quiet...she was clearly quite emotional and upset at the topic being brought up but was very careful with her words. I think she's afraid I'll tell this person what she said if she confesses to it, but I don't have a doubt in my mind most of her suicidal behaviour is a call for help from this person. But she was trying to end the conversation at all costs lol, using humour, changing the topic, etc.
Honestly I really shouldn't be worrying about this girl right now though as I have my own life. But I can't help it when I feel like I'm looking at 18 year old me again.