Is folding Top 2 here weak or smart?

[NickPoker]

Doyles Room Full Ring $1-$2

My opponents probably see me as a bit too loose at this point, my aggression has been moderate, definately not extreme. I have laid a couple hands down to reraises on the last couple orbits. I have not seen the main villain get out of line, I have seen him showdown 1 hand when he reraised, and he had the goods (a set).

Preflop (10 players)

Hero ($315) UTG+1 K [img]/images/graemlins/spade.gif[/img]J [img]/images/graemlins/spade.gif[/img] limps in
MP ($125)(main villain) limps
Both blinds call
Pot $8

Flop K [img]/images/graemlins/diamond.gif[/img]J [img]/images/graemlins/club.gif[/img]6 : [img]/images/graemlins/heart.gif[/img]
Hero bets $6, MP calls, BB calls
Pot $25

Turn 9 [img]/images/graemlins/diamond.gif[/img]
Hero bets $15
MP raises to $75 (he only has about $35 left)
BB folds

Do you continue with the hand? (a call and push are almost the same thing)

Any comments on the other streets? Part of the reason I was a little unsure was that I was playing a little loser than I usually do. If I was playing tighter I would have been pretty sure I was beat by this player. Obvious concerns here are a set or Q10.