I turn top and bottom deeeeeeeep

[Double Eagle]

Villain is GR33D, he's a tag with tricks and I was not that surprised to see him raise this turn and instantly wished I had checked it to him. My hand is usually best but very very vulnerable and when it's not I'm crushed. I am clueless on how to proceed here. Ideas?

Poker Stars, $1/$2 NL Hold'em Cash Game, 6 Players
LegoPoker Hand History Converter

SB: $198
BB: $205.55
UTG: $200
Hero (MP): $900.50
CO: $423.20
BTN: $197

Pre-Flop: A[img]/images/graemlins/club.gif[/img] 3[img]/images/graemlins/club.gif[/img] dealt to Hero (MP)
UTG folds, <font color="red">Hero raises to $8</font>, CO calls $8, 3 folds

Flop: ($19) 3[img]/images/graemlins/heart.gif[/img] 6[img]/images/graemlins/spade.gif[/img] T[img]/images/graemlins/spade.gif[/img] (2 Players)
<font color="red">Hero bets $12</font>, CO calls $12

Turn: ($43) A[img]/images/graemlins/heart.gif[/img] (2 Players)
<font color="red">Hero bets $28</font>, <font color="red">CO raises to $70</font>, Hero pukes.