Responses
This is the most useless reply ever but I've read this before like years ago I'll try looking (not in my lists sadly)
it could be cozy obsession, maybe??
Maybe this?
https://www.mangago.me/read-manga/two_sions/
yess this is the one thank you !
MC has a crush on his best friend but the best friend is a major douche bag. Something happens that causes the MC to transport to a new dimension where he meets that dimensions version of his best friend. Turn out in that world the ML and MC were a couple but that worlds version of him died. Things happen and the MC and ML return to MCs orgibal world and get together.