I do wish a mental health expert would weigh in here but here’s what I think. Depression, generalized anxiety, it’s stuff many deal with. But when it progresses to idealization of suicide : that one is tough to pick up on. IMO once the sufferer decides upon that escape route, they can be focused and cunning. The last thing they want is to be thwarted. Remember the case of Kristin Westra in Maine? Several years ago? She was asked, mere hours before, iirc, if she felt suicidal. She smoothed everything over. She expressed she’d be fine.
What should her husband have done differently?? Would my intuition have been any better? Doubt it. Bless him, he’s a victim who will never be the same.
To me it’s a catch-22. The loved one , even if they have fears, certainly doesn’t want to plant ideas by insisting that, yes, I believe you ARE suicidal!
I guess it just breaks my heart to imagine the agony of self-reproach the family goes thru, and yet so often it’s not deserved or fair. And God forbid any finger pointing. As if the loss and the shock wasn’t enough to endure.
All just my opinion from a heart that cares.