[imfatandugly]

I think you should bet this river a significant portion of the time, make it a larger sized bet also. It's pretty easy to put you on a diamond flush draw considering that you would have bet such a draw heavy board with a made hand on the flop.
Raising turn after checking flop on that "blank" definitely screams draw to me, so if your against a good hand reader i'd definately fire another one out there.

Against more of a first level thinker i'd be much more inclined to check.