river fold?

[sl4v3]

$10/$20 6 max on Party. Hadn't played with villain long but he seemed fairly loose passive.

Preflop: Hero is BB with 8[img]/images/graemlins/heart.gif[/img], 7[img]/images/graemlins/heart.gif[/img].
2 folds, 3 calls, Hero checks.

Flop: 9[img]/images/graemlins/heart.gif[/img], J[img]/images/graemlins/diamond.gif[/img], 6[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(4 players)</font>
SB checks, Hero bets, MP folds, Villain raises, SB folds, Hero calls.

Turn: T[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>
Hero bets, Villain calls.

River: Q[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
Hero bets, Villain raises, Hero folds.

Is my river fold here ok? It completes a flush draw as well as a higher straight draw. Although he may realize this and decide it's a good place to try a bluff. I hadn't seen villain try anything tricky yet though (although, as I said, I hadn't played with him long).

Also, what about my flop bet. Would a check/call been a better plan with 4 players seeing the flop (2 to act after me)?