Overpair on paired board, LAG opponent

[igetjokes]

Looking for opinions on this hand. Villain seems very aggressive over ~20 hands; with 3 players at table he 3bet me preflop then bet/3bet flop 3 times in 5 hands. I have not been in a showdown with him and have not seen him showdown with other players.

Table has just filled up, I have been quiet for an orbit, then this hand:

Party Poker No-Limit Hold'em, $0.50 BB (6 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

SB ($49.50)
BB ($22.81)
UTG ($57.75)
MP ($50)
Hero ($53.65)
Button ($89.92)

Preflop: Hero is CO with T[img]/images/graemlins/diamond.gif[/img], T[img]/images/graemlins/spade.gif[/img].
UTG calls $0.50, <font color="#666666">1 fold</font>, <font color="#CC3333">Hero raises to $2.5</font>, <font color="#666666">3 folds</font>, UTG calls $2.

Flop: ($5.75) 4[img]/images/graemlins/spade.gif[/img], 5[img]/images/graemlins/heart.gif[/img], 5[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">UTG bets $0.5</font>, <font color="#CC3333">Hero raises to $6</font>, <font color="#CC3333">UTG raises to $11.5</font>,

Hero??

I've been in this situation a lot recently, it seems everyone and his dog wants to represent trips on a paired board.