Bet the river here?

[Pitbullo]

Place for a blocking bet here? Should I bet this river?
Villain calls a lot of raises, but almost never raises by himself. Board is really drawy. Anything else I should change here? I don´t like cbeting with 3 people in the hand.

PokerStars No-Limit Hold'em, $1.00 BB (6 handed) pokerhand.org hand converter

Hero ($120.25)
Button ($60.50)
SB ($162.35)
BB ($44.80)
UTG ($123.60)
MP ($114.60)

Preflop: Hero is CO with Q[img]/images/graemlins/spade.gif[/img], A[img]/images/graemlins/club.gif[/img].
<font color="#666666">2 folds</font>, <font color="#CC3333">Hero raises to $4</font>, Button calls $4, <font color="#666666">1 fold</font>, BB calls $3.

Flop: ($12.50) 6[img]/images/graemlins/club.gif[/img], 9[img]/images/graemlins/heart.gif[/img], J[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(3 players)</font>
BB checks, Hero checks, Button checks.

Turn: ($12.50) Q[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(3 players)</font>
BB checks, <font color="#CC3333">Hero bets $9</font>, Button calls $9, BB folds.

River: ($30.50) A[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
Hero checks, Button checks.

Final Pot: $30.50