25NL A9s...I play bad.

[drugged]

Villian is loose passive and hasn't really done anything out of line except see a lot of flops. Comments on all streets appreciated.

PokerStars No-Limit Hold'em, $0.25 BB (6 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

UTG ($42.50)
MP ($31.80)
CO ($15.50)
Button ($36.90)
SB ($25.10)
Hero ($22.85)

Preflop: Hero is BB with A[img]/images/graemlins/spade.gif[/img], 9[img]/images/graemlins/spade.gif[/img].
UTG calls $0.25, <font color="#666666">4 folds</font>, <font color="#CC3333">Hero raises to $1.25</font>, UTG calls $1.

Flop: ($2.60) J[img]/images/graemlins/spade.gif[/img], 9[img]/images/graemlins/club.gif[/img], 8[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets $2</font>, <font color="#CC3333">UTG raises to $4.5</font>, Hero calls $2.50.

Turn: ($11.60) A[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
Hero checks, UTG checks.

River: ($11.60) 7[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>
Hero checks, <font color="#CC3333">UTG bets $2.5</font>, Hero calls $2.50.

Final Pot: $16.60

Should I lead the river? For how much? Fold to a raise?