Full Tilt No-Limit Hold'em, $2 BB (5 handed) Converter Tool from (Format: Bet The Pot)

SB ($191)
BB ($92.95)
Hero ($264.75)
MP ($214.80)
Button ($56.95)

Preflop: Hero is UTG with , .
Hero raises to $7, 3 folds, BB calls $5.

Playing against a semi passive player.
Flop: ($15) , , (2 players)
BB checks, Hero bets $11, BB calls $11.

Turn: ($37) (2 players)
BB checks, Hero checks.

River: ($37) (2 players)
BB bets $21, Hero ???

What alternative lines do I have. Is this river always a fold?
What does villain have, a weak queen?

I trust my read, fold the hand and move on to the next one.