Semi-bluff/CB rivers flush on paired board, faces a push

[Benholio]

Pokerroom 5-max $1 NL.
Relevant stacks ~$90.
Reads: None! First orbit, and villain is completely unknown to me. While it means he isn't a regular/multitabler, thats about all. (I have notes on a good many regulars)

Hero opens on button for $4 with 8[img]/images/graemlins/heart.gif[/img] 9[img]/images/graemlins/heart.gif[/img]
SB calls, BB (villain) calls.

Flop ($11): 3[img]/images/graemlins/diamond.gif[/img] 3[img]/images/graemlins/heart.gif[/img] Q[img]/images/graemlins/heart.gif[/img]
SB check, BB check, Hero bets $10, SB folds, BB calls.

Turn ($30): 3[img]/images/graemlins/diamond.gif[/img] 3[img]/images/graemlins/heart.gif[/img] Q[img]/images/graemlins/heart.gif[/img] T[img]/images/graemlins/spade.gif[/img]
BB check, Hero check.

River ($30): 3[img]/images/graemlins/diamond.gif[/img] 3[img]/images/graemlins/heart.gif[/img] Q[img]/images/graemlins/heart.gif[/img] T[img]/images/graemlins/spade.gif[/img] 6[img]/images/graemlins/heart.gif[/img]
Villain bets $77.45 and is all-in, Hero ...?

Advice on all streets welcome, but especially turn and river!

[warsaw]

Check is perfect on the turn. Villian is an ass for pushing the river like that. I fold.