I know some. Don't know if you'll like them as they are not everyone's cup of tea.
http://www.mangago.zone/read-manga/life/
http://www.mangago.zone/read-manga/confidential_confessions/
http://www.mangago.zone/read-manga/delivery/
You can also try "Skyhigh" if you don't mind supernatural themes.
Oh....and for bl you can try something from here - http://www.mangago.zone/home/mangalist/57857/
(I mentioned the ones with suicide themes in the review notes. And most of the mangas in there have characters with mental issues ( ̄∇ ̄")
These days I've been crying and hating myself for being so selfish. Like genuinely selfish. And I can't help being selfish, but I also hate myself for it at the same time. I'm so conflicted that I'm just confuzed.
So I'm just up for manga that deals with mental health issues (depression, anxiety, suicidal thoughts etc.). Straight, BL or no romance at all are ok.
(and no I'm not depressed or anything like that lol)