KK overpair on scary river card

[killer_kill]

Local Home Game 1.00/2.00 Cash Game 7 Handed-Max Buy-in 100.00
HERO-(UTG)185.00
MP-95.00
MP-120.00
CO-88.00
BTN-135.00
SB-70.00
VILLAIN (BB)-165.00

I dont know my stats for session, but i'm percieved to be a semi-lag player. I usually dont raise weird hands UTG due to that it's a loose game. Skill level of players at this home game isn't very high. VILLAIN has recently adjusted from being pretty tight with betting and hand selection, but recently has become much more lag and bluffing more. As i said he views me as a bully who doesn't need a great hand to raise UTG.

PRE-FLOP
HERO UTG raises $8 - K-K
Five folds, BB calls 6.

FLOP
J J 6 Rainbow VILLAIN bets $15, HERO calls.

TURN
Q No flush draw. VILLAIN checks, HERO checks behind. (I check here feeling his c/r pct is high enough that i didnt think he would call with worse but would reraise due to my image to him as a lag). I also felt he could slowplay trips on turn since he knows i'm aggro and likely to fire at weakness.

RIVER
Q VILLAIN fires $30, HERO folds.

I didnt have a solid read on where i was at so i decided to take the conservative route. I had been winning in this game w/o calling river bets when i was unsure of where I stood.
If my thread is bad then dont bash please. First Post be nice. I really like the site and the regs who write great threads and responses.