Ooh if you haven’t found it yet I think it’s this one:
https://www.mangago.zone/read-manga/hoshoku_sha_kisumi_kun/
Is the seme a theater actor or something? And the uke is a soccer player in college? Cause I remember a manga like that although it's only a one shot, but tge seme always talk about double suicide and talks about cutting himself letting the eating the uke him to be with him forever and the uke be like "You cant do that. I cant eat you, I'll shit out and flush u down the toilet in no time" or something?
Have you already found it? ( ̄∇ ̄") If not, i guess the manga you're looking for is this:
https://www.mangago.zone/read-manga/sweet_crazy_days/
does anyone know of a manga that has a seme who’s kinda creepy and is obsessed with the uke and constantly talks abt double suicide and things like eating him so the uke can stay with him forever. The uke has short hair and I think is in college, also the uke completely ignores his obviousness and twisted behavior and likes the seme, the uke checks up on him and brings him food and stuff I think, also the seme never leaves his house and is always home.