Pair on Flop, Striaght on River, Fold Anyway?

[Moozh]

No real reads on opponents, sorry. Nothing to make anyone stand out at the table yet. How's my play leading up to the river? Who checks the river, who bets? What do you do when it's two back?

Party Poker 3/6 Hold'em (6 max, 6 handed) converter

Preflop: Hero is BB with 4[img]/images/graemlins/spade.gif[/img], A[img]/images/graemlins/spade.gif[/img].
UTG calls, <font color="#CC3333">MP raises</font>, <font color="#666666">2 folds</font>, SB calls, Hero calls, UTG calls.

Flop: (8 SB) 4[img]/images/graemlins/heart.gif[/img], 2[img]/images/graemlins/diamond.gif[/img], 5[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(4 players)</font>
SB checks, <font color="#CC3333">Hero bets</font>, UTG calls, MP folds, SB calls.

Turn: (5.50 BB) 2[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(3 players)</font>
SB checks, <font color="#CC3333">Hero bets</font>, UTG calls, SB calls.

River: (8.50 BB) 3[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(3 players)</font>
SB checks, Hero checks, <font color="#CC3333">UTG bets</font>, <font color="#CC3333">SB raises</font>, Hero...