$5-$10 STARS is this obvious?

[intel]

Opponent is semi reg, pretty solid from what i've seen, not overly aggro or anything,

Poker Stars, $5/$10 NL Hold'em Cash Game, 9 Players
LegoPoker Hand History Converter

MP2: $1,455.75
CO: $991
BTN: $4,389.50
Hero (SB): $1,675.25
BB: $1,065.25
UTG: $879
UTG+1: $950
UTG+2: $462.50
MP1: $1,248.05

Pre-Flop: T[img]/images/graemlins/club.gif[/img] K[img]/images/graemlins/club.gif[/img] dealt to Hero (SB)
UTG folds, UTG+1 calls $10, UTG+2 calls $10, 2 folds, CO calls $10, BTN calls $10, Hero calls $5, BB checks

Flop: ($60) 3[img]/images/graemlins/diamond.gif[/img] T[img]/images/graemlins/spade.gif[/img] K[img]/images/graemlins/diamond.gif[/img] (6 Players)
<font color="red">Hero bets $50</font>, 3 folds, <font color="red">CO raises to $150</font>, BTN folds, Hero calls $100

Turn: ($360) 8[img]/images/graemlins/heart.gif[/img] (2 Players)
Hero checks, <font color="red">CO bets $280</font>
Hero?

This hands been killing me all day, is the solution simple&gt;?
[img]/images/graemlins/confused.gif[/img]