give up or fire again?

[Unknown Soldier]

villains 37/17/1.8 over 200ish datamined hands, never played against him before. wtsd is 30


Party Poker - No Limit Hold'em Cash Game - $3/$6 Blinds - 6 Players - (LegoPoker Hand History Converter)

SB: $920.45
BB: $79.35
UTG: $602.40
MP: $87.00
CO: $696.25
US (BTN): $600.00

Preflop: US is dealt 8[img]/images/graemlins/club.gif[/img] A[img]/images/graemlins/club.gif[/img] (6 Players)
UTG calls $6.00, 2 folds, <font color="red">US raises to $27.00</font>, 2 folds, UTG calls $21.00

Flop: ($63) 9[img]/images/graemlins/club.gif[/img] 7[img]/images/graemlins/spade.gif[/img] K[img]/images/graemlins/diamond.gif[/img] (2 Players)
UTG checks, <font color="red">US bets $48.00</font>, UTG calls $48.00

Turn: ($159) J[img]/images/graemlins/club.gif[/img] (2 Players)
UTG checks, <font color="red">US bets $111.00</font>, UTG calls $111.00

River: ($381) 8[img]/images/graemlins/diamond.gif[/img] (2 Players)
UTG checks, US ??