JJ and can't figure out opponent

[Crumpled Ear]

Reno, Circus Circus, 3-6

I've been here an hour and main opponent has been in about a fourth of the hands but hasn't shown any of them down.

Preflop--I'm under the gun with JJ and raise. All fold except CO and BB who call.

Flop: Q [img]/images/graemlins/spade.gif[/img] 9 [img]/images/graemlins/diamond.gif[/img] 8 [img]/images/graemlins/club.gif[/img] (3 players)
BB checks, I bet, CO raises, BB folds, I call.

Turn: (Q [img]/images/graemlins/spade.gif[/img] 9 [img]/images/graemlins/diamond.gif[/img] 8 [img]/images/graemlins/club.gif[/img]) 2 [img]/images/graemlins/heart.gif[/img] (2 players)
I check, CO checks.

River: (Q [img]/images/graemlins/spade.gif[/img] 9 [img]/images/graemlins/diamond.gif[/img] 8 [img]/images/graemlins/club.gif[/img] 2 [img]/images/graemlins/heart.gif[/img] ) 3 [img]/images/graemlins/heart.gif[/img] (2 players)

I bet, CO raises (what the ...?) what should I do?

[Crumpled Ear]

CO has KQ offsuit for a pair of queens and takes it over my JJ. Dang!

[bernie]

Call. You could very well have the best hand. I sure wouldnt be sure enough to fold here.

b

[The Dude]

Did you consider check-calling on the river? I'm not necessarily saying it's right here, but if you always bet the river here after the turn is checked through, you're making a mistake.