Responses
Plot is way too specific, I've recommended similar stories -
Exploratory Battle
https://www.mangago.me/read-manga/exploratory_battle/
To My Creepy Boy
https://www.mangago.me/read-manga/to_my_creepy_boy/
Crossing the Line
https://www.mangago.me/read-manga/crossing_the_line_1/
A Secret Romance Between Us
https://www.mangago.me/read-manga/secret_love_affair/
Path to You
https://www.mangago.me/read-manga/path_to_you/
enjoy (｡•ᴗ-)✧
Like maybe the seme is super popular and uke isn't, so even though they're dating uke gets self conscious and either puts distance between them or even breaks up with the seme.
Seme is upset but at the same time kind of doesn't care.
But after the distance/break up uke starts to hang around someone else and seme gets insanely jealous.