PokerStars No-Limit Hold'em, $0.50 BB (9 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

BB ($63.90)
UTG ($71.15)
UTG+1 ($47.75)
MP1 ($21.55)
MP2 ($53.10)
MP3 ($53)
CO ($47.15)
Hero ($155.85)
SB ($29.05)

Preflop: Hero is Button with Q, Q.
3 folds, MP2 raises to $2, 2 folds, Hero raises to $7, 1 fold, BB calls $6.50, MP2 folds.

Flop: ($16.25) K, 2, 3 (2 players)
BB checks, Hero bets $9.5, BB calls $9.50.

Turn: ($35.25) 5 (2 players)
BB checks, Hero checks.

River: ($35.25) 2 (2 players)
BB bets $33, Hero folds.

Final Pot: $68.25

BB is 26/15/1... He likes to check/call a lot and generally is passive postflop. I'm running 21/9/3 and we have both been at this table for about 100 hands. Is there any line I could have taken to play this better? I wasn't sure if he was capable of a bluff on the river...