http://www.mangago.me/read-manga/boku_no_kareshi_no_sukinahito/
I think you are talking about this one.
This maybe? I barely remember anything about the book so I’m not sure.
http://www.mangago.me/read-manga/yasashiku_oshiete/
I’m pretty sure it is this one and I love it too http://www.mangago.me/read-manga/bokura_ga_koi_wo_ushinau_riyuu/

looking for a BL manga about two guys having an unrequited love one of them has one for their childhood friend and the other for their brother?? if i rmbr correctly they talk about to each other and stuff and than later get together sorry if it’s vague