Betting when possible draw completes on 5th street?

I have been trying to figure out the best approach to this for a while. Say you have a good hand preflop and you raise with it. You get a couple callers then the flop comes. Its a good flop for you and you bet about a pot size bet. You get one caller. There is a draw on board. Next card doesnt complete the draw. You bet. He calls. Then on the end the draw is completed. I hate checking here because now he can move in on you regardless of what he has. What is the best approach to this situation that seems to keep coming up. How do you bet to get the best idea if he was on a draw without puting you in the situation to lose all of your money.