c-bet bluff defense?

1/2, two callers, i raise with AKo in BB, both call. flop is Q74 with two hearts. i c-bet and get raised, i fold.

question: is this sometimes a bluff raise by him if he knows i'm c-betting (it's so common now anyway)? is there anything i can do about it? it's hard to find evidence since he doesn't show his cards.