Can anyone recommend me some yaoi couples that didn't work out because one of them was che...

idk if this counts, but if u feel like crying then go ahead-

Paradise view (but start with the prequel Kimi to Parade to get the whole picture)

Thank you all so much(≧∀≦)

http://www.mangago.zone/read-manga/hate_mate/ (no deaths or cheating, the MC just moved on)

Oh, I've already read that... thank goodness he ends up with jun