[elindauer]

Forget the turn... why did you pay off the river? There are 19 individual cards that beat you now, not to mention all hands suited in diamonds. If he called on a flush draw, it's most likely an ace high flush draw, right? Now he has to have this bare ace, and have missed the board, and bluff it into you. How likely is that?

The board is terrible for your hand. Take your free card and give up when you miss.

good luck.
eric