They were friends in college:
1. http://www.mangago.zone/read-manga/after_morning_love/
2. http://www.mangago.zone/read-manga/before_daylight_love/
Roommates in high school:
1. http://www.mangago.zone/read-manga/koi_ni_nare/
2. http://www.mangago.zone/read-manga/koi_nanka_shitakunai/
window to window and room to room
not rly roommate but a friend from school, they're the main for the second half of the story
http://www.mangago.zone/read-manga/viewfinder_ez/?eeCI
For You Love, the best friend gets a side story called Form of Sympathy
Omg thank you so much the manga is so good (≧∀≦)
Thank you
Bl manga where main character has a best friend who then later gets their own side story.