*Grunch*
I don't think the River was where you made your mistake. I think your play up to the turn is fine, but at the turn you should have bet. Villain say the possible flush, he knows he only has part of it and would be drawing. He doesn't know he will hit. You might have won the pot right there with your $2 you trhew out on the river. As far as the real river play you made, your bet wast fine, but minus any reads on this guy, I'm folding to his raise. I don't know where the A[img]/images/graemlins/heart.gif[/img], K[img]/images/graemlins/heart.gif[/img], nor the Q[img]/images/graemlins/heart.gif[/img] all of which beat your J[img]/images/graemlins/heart.gif[/img].