i can only think of these two:
https://www.mangago.me/read-manga/to_my_valentine/
and this (but this one’s a manhua tho)
https://www.mangago.me/read-manga/hunting_game_1/
thank you so much but i think i found the one i was looking for https://www.mangago.me/read-manga/winter_that_year/

my reading list is gone but I'm looking for a yaoi where the ml fell in love with his best friend who is straight and got married and had a son who fell in love with the uke since he was young and years later he came to the ukes house to stay for a while and their relationship began
i'm pretty sure the last time i read it the manhwa was incomplete but now i can't remember the title and my list is gone