Sounds so much like my partner, insomnia at night, sleeps all day. Lives in a house share and has depression. Also a town with a dealer on every street whilst I live in a rural area. He is getting treatment for that now though, only since I noticed certain behaviours and began questioning his honesty
I wish I could say he’s now told me the full truth of his addiction but it’s highly unlikely and something I’ll have to live with
He has been doing zoom meetings but I don’t know if that’s short lived