I think I know which one you're talking about but I forgot the name. Is there a part where the seme buys some condoms and the uke asks why he bought them and it turns out that the seme was just practicing how to using condoms cause he never had sex just like the uke? Did the uke work at a convenience store? Lol I want to remember the name.
http://www.mangago.me/read-manga/tonari_ni_kedamono/
I thinks is this one xd
Tonari ni Kedamono
Yes it's this one thank you!!! ヾ(❀╹◡╹)ﾉ~
It's about 3 childhood friends who live next to each other, number 2 is in love with number 1 but one day they discover number 1 already has a boyfriend. But then number 3 tries to comfort number 2 and tell him he knew he likes number 1 but he is in love with him (number 2) additional info number 1 is poor and number 3 is rich