http://www.mangago.zone/read-manga/totally_captivated/
This one is good at the start the cheated ex-boyfriend(uke) wants to get back on his ex(seme1) and gets the help of some loan sharks (the boss is the "New boyfriend" (seme2))the seme 1 has to work for the seme2 and has to watch his uke getting kissed and more by the boss until some part where the boss gets interested in the seme1 and tells him to sleep with him or he will break up with the uke and what happens after that is for you to finde out ;)
I HATE those types too ヽ(`Д´)ﾉ
But most about cheating I have read so far, they get back together. It totally sucks
May be you can try this one? http://www.mangago.zone/read-manga/warui_yume/
The uke takes his revenge in the cruelest way possible.
guys i need a yaoi manga about badass independent uke who get back at the seme for hurting him about something. It can be the seme cheating and the uke like dump his ass or something? Is it exist? Please im here really pissed after reading that manga (forgot the title) about seme who cheat 5 TIMES oh the uke and the uke still forgive him -_-