river fold?

[RainbowBright]

<font color="blue">Preflop is whatever...Villain and I have been battling a little post flop but neither one of us has shown down many hands. The size of his river bet confused me but I couldn't put him on any missed draws. So my guess is he had it on the turn, but since I have the nut diamond does anyone like a raise on the river? </font>

Poker Stars - No Limit Hold'em Cash Game - $2/$4 Blinds - 5 Players - (LegoPoker Hand History Converter)

Hero (SB): $708.20
BB: $807.40
UTG: $420.10
CO: $519.00
BTN: $360.00

Preflop: Hero is dealt 7[img]/images/graemlins/club.gif[/img] A[img]/images/graemlins/diamond.gif[/img] (5 Players)
3 folds, Hero calls $2.00, BB checks

Flop: ($8) Q[img]/images/graemlins/diamond.gif[/img] 7[img]/images/graemlins/diamond.gif[/img] 3[img]/images/graemlins/spade.gif[/img] (2 Players)
<font color="red">Hero bets $4.00</font>, BB calls $4.00

Turn: ($16) 8[img]/images/graemlins/diamond.gif[/img] (2 Players)
<font color="red">Hero bets $10.00</font>, BB calls $10.00

River: ($36) 5[img]/images/graemlins/spade.gif[/img] (2 Players)
Hero checks, <font color="red">BB bets $28.00</font>, Hero ?

Pot Size: $64.00 ($1.75 Rake)