[crockpot]

how much money is on the table?

assuming it's a normal amount for a .25/.50 game, the best play is usually to bet and fold if you are raised. remember, if he bets, you will not have odds to call hoping to hit a full house anyway, but he could easily be betting a worse hand than yours. giving a free card is bad here, and it's really not that likely you're behind, even though he called your flop bet.

the key question is how much to bet. you want to make it big enough that you are giving a flush draw bad odds, but small enough taht you can easily get away from it if raised. $10-$15 is a good range, depending on how deep the money is.