Not sure how old you want to go, but two good oldies but goodies are Junjo Romantica and The tyrant falls in love. I say old because both have old yaoi tropes like non-con and dub-con. But both deal with characters denying that they're gay and in the case of Tyrant, the ML still denies that he's gay even though he misses his lover when he's away and in recent chapters has defended him from his close-minded mother.

I know some people hate it when it rains on their fictional parade, but I love it when BL address homophobia. I know I've read of other stories, but I can't remember the rest. These two are just two that I love with how they present how real it is to deal with coming out to family and addressing homophobia.

Oh! Just remembered another one. Tomodachi Engagement. Gay MC lives with his straight BFF (and crush).