If you are fine with manhwa with Guideverse settings I'll recommend
https://www.mangago.zone/read-manga/success_oriented_guide/
heesu in class 2 is literally this if you haven't read it already!
https://www.mangago.zone/read-manga/heesu_in_class_2/
and hatsukoi note kinda
https://www.mangago.zone/read-manga/hatsukoi_note/
not exactly like that but MC's friend like ML and MC is trying to watch if ML deserve his friend and later on try to get them together
https://www.mangago.zone/read-manga/involuntary_romance/
youre perfectly describing bad contact!!! https://www.mangago.zone/read-manga/bad_contact/
any who can rec a bl where either of the leads wanted to help the other get close to their supposed love interest but both ended up liking each other instead... or theres this silly miscommunication where A thought B liked C
so A tried to help B
but B actually liked A.
so cliche but ikyk what i mean