Where you made your mistake...
 

First, does UTG have you covered?

Second, UTG played this a lot like an Ad.

Third, and most importantly, why the hell did you just flat call the raise from the button? You really can't afford to see another diamond come off and there's been enough action already to safely put some of your babies in the pool without fear of taking down a nothing pot. If you put in a hefty reraise and then UTG comes back over over the top then I think you could make the fold a lot more easily. As is, your call could have quite possibly signaled to UTG that you didn't have a made flush. I think this is where the hand went wrong for you.

Re: Flopped Flush - What to do
 

Not only have you flopped a flush, be you have outs with your OEsfD.

Push.

jw