[djshawk]

I dont think I'd bet out this flop, but you dont want them getting their straight draws cheaply either, so its a tough decision. Your b/d flush draw helps, but I still think I check-call or check-raise depending on where/if the bet comes is best.
I dont like betting out the turn either, especially now the flush draw has gone and an overcard is on board. Pot is small. I think I would check/fold this turn. This again seems all horrible though.
River, not an easy position to be in, you showed weakness on a scare card so he could easily be bluffing it up, but he must have been staying in the hand for something and that was likely the straight. If he had the 5 then the 8 completes his straight, if he had the 8 and was looking for a gutshot then he just beat your pair. I dont like calling this bet but I dont like folding either. Not much help!