Unfortunately I've just finished this
Speak of the devil, kinda?
https://www.mangago.me/read-manga/speak_of_the_devil/
MC liked ML (his boss), somehow they became fwb, but at some point MC and ML broke up then ML realized he liked MC (it’s been a while since I read so the details are iffy).
maybe kiss me liaarrr???? its something similar to what you want
Ouuu read that already sadly
Ok ok ty ty might try
Bye ive been begging for a trope like this but I dont get any recos but when I do it's just third ending, so like it's like the mc likes ml but ml doesnt like him so mc keeps pursuing him in hopes to make ml fall for him, eventually getting ml to get used to mc bothering him and when mc stopped because he realized it's not working, the ml noticed his absence and began to care for him