his suspicious actions really makes me think he's cheating.

I was thinking the same, but maybe he doesn't want others to see him like that (naked) ...?

But now it seems like he is avoiding him and now when they meet up he interprets everything to sex. Possesiveness is one thing but what's the point if you neglect your lover.

I thought he was just trying to keep the new, younger clients away from his hyung. I didn't get the cheating vibe at all.