"The egg project" its on webtoon, though they know eachother from childhood bc their mothers are friends, but they are more like childhood enemies xd
https://www.mangago.me/read-manga/high_school_salty_heart/
Omegaverse- Secret crush on his popular highschool friend who is always dating around. He goes to military to forget him, but when he comes back he sees him again and still likes him as much
https://www.mangago.me/read-manga/love_is_an_illusion_superstar/
Mc is a popular alpha in highschool. After some events he reunites with his old childhood friend, who grew distant from everyone. The mc will try to get close to him
https://www.mangago.me/read-manga/ashita_wa_docchi_da/
Mc is a lazy student who keeps getting into fights. He is secretly in love with his childhood friend(he isnt a nerd but is good with studying), but has never said anything because his childhood friend is homophobic and always dating around
https://www.mangago.me/read-manga/sweet_shots/
Mc is a shy closeted gay who has a childhood bestfriend. He is in love with his handsome player older brother but he was fat and hated his body. After years they reunite and start being friend with benefits but the mc hides his love for him

NERD X JOCK THAT ARE ALSO CHILDHOOD FRIENDS BL PLEASEEEEE