How to hide your gayness?

So I am gay but I'm not out of the closet yet, and I keep getting in awkward situations.... Today I kept looking at this hot guy while he was getting changed and I was caught, I said a guy was hot (no one noticed though). And my friends keep on making gay jokes and calling things gay (in a bad way), how can I get them to stop without being suspicious? And how do o suppress my gayness?