He claims part of him wanted to hospitalize me but he didn't. I guess because I didn't admit to a definite method.
That's fair, but at least in (most? all?) the US, my understanding is mental health professionals are legally required to take action if they have reason to believe someone is in imminent danger. I've been hospitalized for much more passive suicidal thoughts, like reporting I thought I
might attempt, or feeling scared I might attempt - no definite method needed. Most recently I was hospitalized for acting out of character and showing signs of distress. I didn't make any comment on my suicidality at all, and still ended up in a psych ward.
To be clear, I'd say it's absolutely a good thing you
didn't end up locked up, it's just, interesting.
Regardless, it does seem pretty shitty of him to just abandon you like that... I'm sorry you have to deal with that so close to the end.