[mehm]

I'd put villan on AA, AK, KQ, KJ, and maybe 88-QQ (depending on your stats and how well he is paying attention to your play).

If you have been LAG, make a bet that looks like a bluff but will get called by a second best hand. A pot sized bet ruins his pot odds on a flush and might get called with Kx or a pocket middle pair.

If you have been tight/passive, continue to make small value bets.

In either case, I would assume that you have the best hand and might have to pay off a set of 8s.