Dont think its what you're looking for but its similar and you might like it
http://www.mangago.zone/read-manga/dos_obake_ga_nekasetekurenai/
http://www.mangago.zone/read-manga/2345/
Was it this maybe?? I read this a long time ago but it sounds like this might be it
Actually its me who was looking for this one since i read it long time ago n forgot to mark it lol, tnx
http://www.mangago.zone/read-manga/lonely_to_organdy/ not rlly sure if he's 17 but the desc seems close enough
thank you all so much but i actually found it lolol, i think i got the plot wrong its been a while since i read it
http://www.mangago.zone/read-manga/lonely_to_organdy/
YES THAT THANK YOUUUU
okay so there was this one bl manga i read where a guy could see a ghost in his apartment?? the ghost was a 17yr old boy whos unfinished business was that he didn’t tell his childhood friend that he loved him or smth?? when the dude who could see him helps ghost dude, ghost dude “disappears” or smth?? i wanna reread it againn