BB Middle Pair Dilema

[Dunkman]

This is a $3 rebuy sat to the $650 WSOP qualifier, and there's 3 seats available. Final 2 tables, 17 players remaining.

I've been playing with villian in this hand for about 3 orbits since moving to the final 2 tables. I've seen him limp several times, and the only real flop bets I've seen him make were 1/2-3/4 of the pot, be it a cont bet, checked to him on the flop, or when he made a hand. Seemed like a decent player for this tourney at least.

PokerStars No-Limit Hold'em Tourney, Big Blind is t3000 (9 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

MP2 (t36938)
MP3 (t31560)
CO (t62936)
Button (t37296)
SB (t6178)
Hero (t31180)
UTG (t92268)
UTG+1 (t37327)
MP1 (t82064)

Preflop: Hero is BB with 8[img]/images/graemlins/spade.gif[/img], 3[img]/images/graemlins/diamond.gif[/img].
UTG calls t3000, <font color="#666666">7 folds</font>, Hero checks.

Flop: (t7200) 8[img]/images/graemlins/diamond.gif[/img], K[img]/images/graemlins/heart.gif[/img], 2[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
Hero checks, <font color="#CC3333">UTG bets t24000</font>, <font color="#CC3333">Hero ? </font>

After he made that bet I was kicking myself for not betting out on the flop, although the reason I didn't is because I knew I couldn't call a reraise. My plan was for him to fire out a 4-5k bet (my read was that he would do that with any holding) and then come over the top, but this threw me for a loop. I really have no idea what to do here. Thanks...