Responses
I found something that may be it. But the seme & uke are in reversed roles than what you wrote. ~_~
https://www.mangago.zone/read-manga/myuzu_no_gakuen_de_aou/bt/203480/Vol1_Ch4
two lovers living together. One of them decides that its better to go back to being friends and they both agree to keep living together but when seme brings another guy home the uke gets jealous and realizes how much he loves him. i think it was a oneshot.