400NL - catch a bluff from a donkey?

[Mossberg]

villain is 46/5/2 over 105 hands. Passive pre, but more on the aggressive side postflop. He has called me down pretty light, and also raised me a couple times in previous hands, but I never had anything worth showing down. I think it's obvious from his betsizing that this is bluff or nuts/near-nuts.

fwiw I just sat a couple orbits ago and have been raising limpers (often him) and taking pots quite frequently so far. Also, I think he can def call this turn with stuff like T9/98

Blinds: $2/$4
5 players
Converter

Stack sizes:
UTG: $146.70
CO: $685.40
Button: $388.00
Hero: $498.00
BB: $179.95

Pre-flop: (5 players) Hero is SB with J[img]/images/graemlins/heart.gif[/img] K[img]/images/graemlins/heart.gif[/img]
UTG folds, CO calls, Button folds, <font color="#cc0000">Hero raises to $18</font>, BB folds, CO calls.

Flop: 9[img]/images/graemlins/club.gif[/img] 7[img]/images/graemlins/diamond.gif[/img] J[img]/images/graemlins/diamond.gif[/img] ($40, 2 players)
<font color="#cc0000">Hero bets $32</font>, CO calls.

Turn: 2[img]/images/graemlins/club.gif[/img] ($104, 2 players)
<font color="#cc0000">Hero bets $84</font>, CO calls.

River: Q[img]/images/graemlins/club.gif[/img] ($272, 2 players)
Hero checks, <font color="#cc0000">CO bets $250</font>, Hero_______?

[ArturiusX]

I bet the pot on the turn, shove a non-diamond river.

[Laetus]

I fold here, this is a better hand way to often imo.

[yve]

well played, now fold

[Nielsio]

If you were a little shorter, pot flop and c/r turn would be hot.