Flop top 2 in the BB, Tons of action + scary board

[Scorcho]

Only 10 hands on UTG so far. He's 44/0/0.2. Total passive .
CO is 30/15/1.77 after 100 hands.

How's my line here? With CO 3-betting and SB capping on the flop, I had at least one of them on a monster draw (TJc? 65c?) or a set. Just about every draw hit on the turn and I figured I was doomed. How is my line?

PokerStars 1/2 Hold'em (6 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

Preflop: Hero is BB with 7[img]/images/graemlins/heart.gif[/img], 8[img]/images/graemlins/club.gif[/img].
UTG calls, <font color="#666666">1 fold</font>, CO calls, Button calls, SB completes, Hero checks.

Flop: (5 SB) 7[img]/images/graemlins/club.gif[/img], 3[img]/images/graemlins/club.gif[/img], 8[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(5 players)</font>
<font color="#CC3333">SB bets</font>, <font color="#CC3333">Hero raises</font>, UTG calls, <font color="#CC3333">CO 3-bets</font>, Button folds, <font color="#CC3333">SB caps</font>, Hero calls, UTG calls, CO calls.

Turn: (10.50 BB) 9[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(4 players)</font>
SB checks, Hero checks, UTG checks, CO checks.

River: (10.50 BB) 6[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(4 players)</font>
SB checks, Hero checks, <font color="#CC3333">UTG bets</font>, <font color="#CC3333">CO raises</font>, SB folds, Hero folds, <font color="#CC3333">UTG 3-bets</font>, CO calls $2 (All-In).

Final Pot: 16.50 BB