following
You've read my mind. I was about to comment that, but I'm sorry, I haven't read anything that is similar to your question.
Following
hmm i can only think of this one
http://www.mangago.me/read-manga/overdose/
Folowing
i suddenly remembered this one
http://www.mangago.me/read-manga/ore_wa_senpai_no_nan_nan_desu_ka/
Oohhh i have one, Hina wa Mitsuiro no Koi ni Torawareru
Yaoi manga where seme was a jerk/cheated on uke and he breaks up with him but then he regrets as uke already found someone else. It doesn't have to be exactly the same but I just want it if the seme is the who broke them up and ends up regretting. It doesn't matter if they end up together in the end or not