I'm kinda confused at your position in the hand but I assume your last to act by how you typed the hand and you said you had position.
I agree I think your losing value on the turn, but first, why not check raise the bet on the flop? You've got position with the nuts and you've got people betting into you. If their drawing you want to make them pay and a check raise seems to suit your image perfectly. There probably not gonna believe you have the nuts. In this situation if you feel your worried about the draw hitting I think you should check raise the flop a good value so that you can pot control on the next streets, with that being said I think you should check raise no less than 3.50 , and go all in to any resistance of course.
You check raise no less than 3.50 so that way you've got some value in the pot before you start worrying about pot control, because once pot control comes into play your probably gonna have to turn it down a notch, and plus if the flush didn't come on the turn you've got a juicy pot with nuts still. I would say at least 7 to 8 times out of 10 you check raise in position on the next street it will be checked to your action. The difference now is, on the river if a value bet is thrown, now when you call you win a much juicier pot, especially if numerous people call your check raise, and I guestimate that being about a 10-15, yeah you might lose this pot sometimes, but I think your going to win this pot more than you lose it in the long run and those extra dollars will matter.
Since you didnt check raise the flop, I think you should bet what you feel your hand is worth on the turn, and when I say that I don't mean a value bet, you bet the turn knowing that your more than likely only going to check call the river; this will help you get your last bit of value if you have the winning hand. You want to bet at least half the pot to I would say up to 3/4 to 4/5 of the pot. even though its a scary community I would want a call here. By betting this much some people will either put you on a stronger hand than you have such as the flush itself, or they will than check to you on the river thinking that your aggressive image is gonna make you bet on the river so they can check raise you.
By the river your probably just calling and if no bet is made I would lean towards a check slightly more than a value bet. If you haven't put out a raise or bet by the river than I think you just call. One, If you bet and they reraise you, won't know if they're playing your aggressive image and messing with you. Two, if you bet and they reraise they might reraise you so big it becomes more of a risk to call and if you decide to fold than you won't get the information you needed to see -- did he have it or not.
CHECK RAISE THAT FLOP THOUGH, that was a golden opportunity for you to boost that pot right then and there