No bad vibes except that you "don't think that'd be a good idea" that he'd come visit you at the BF's house...sorta kinda a bad vibe maybe.

Sounds to me like he is sounding out the waters with comments like he was calling the other times to talk to you,,,,,he hasn't found anyone that measured up to you.

I would be careful how much I would allow him back into my life of how much I would tell about your current life without him.

If is still has his issues, that isn't good....that means he could put you through the emotional thing again & still blames you for why he got sick & suicidal. Allowing a rerun back into your life that wasn't good the first time would really be something I would question if I wanted back into my life..

Please be cautious & listen to your internal voice.....that is the one that is usually right. For some reason, our internal voice & feelings know more than we give them credit for.
Sounds like trouble to my simple mind.

Be careful to protect yourself.....we all care about you
Debbie