Like the topic states, I'm looking for a manga where I can't remember the title. I can't really even remember if it was yaoi or shounen ai...

...the main thing that the protagonist like a guy (i think it was a friend) who wanted a big family. And being a guy, the protagonist thought that he wouldn't be able to bring them happiness, but in the end they get together and are happy.

Sorry that I can't be more detailed and thank you for the help ahead of time!

Doushitemo Furetakunai?
Maybe Akarui Kazoku Keikaku (MOROZUMI Sumitomo)?

There are a lot of plots like that.

Ashita mo Tanin?