I like the flop bet. You got called too - good for you. Few people would bet out when they flopped a flush. On the turn I'd probably check and see if I could get him to bet at me, thinking the steal was available. Then I'd raise the same amount he bet and proceed from there.

In short I like how you handled it at first, but automatically escalating the bet on the turn gave him an easy fold. Maybe more money to be made by slowing down.