Responses
I would never ever trust your insticts then
I doubt candy would cheat and it makes even less sense that it'd be with Minha seeing how he just saw him again for the first time in a while and he was talking about how Candy's heart hasn't changed for the past 10 year.
The most logical way for this to play out is for Candy to break up with Jinwoo since Jinwoo was so exhausted and Candy felt like Jinwoo didn't truly love him the same way he loved Jinwoo.
My gut feeling is telling me that candy either feel in love with Minha, and thus felt ashamed for cheating so that is why he told the uke that he is no longer fun to be around. Again this is my feeling.