Villain is a nitty regular (16/13) who I believe 3-bets my button and CO raises light.

Full Tilt No-Limit Hold'em, $0.50 BB (6 handed) Converter Tool from (Format: Bet The Pot)

Hero ($53)
SB ($54.15)
BB ($96.75)
UTG ($55.30)
MP ($49.25)
CO ($53.55)

Preflop: Hero is Button with , .
3 folds, Hero raises to $1.75, SB raises to $6.25, 1 fold, Hero calls $4.25.

Flop: ($12.75) , , (2 players)
SB bets $7.5, Hero calls $7.50.

Turn: ($27.75) (2 players)
SB checks, Hero?

Final Pot: $27.75

Agreed, check. You are not beating much so I look to showdown as cheap as possible.

Check, but I probably raise/call shove the flop.

I'm a nit and I 3 bet light against aggro but and co raises. I play the NL 25 right now.

OK, so back to the hand. If he 3 bets you light quite a bit as it sounds..why not 4 bet him preflop?

I think 4-betting preflop is an option. However, we are in position so calling is fine too, and would be my play here.

Personally I don't often 4-bet JJ, because if I have a good hand I am 4-betting hoping to get allin preflop. Typically I try to stick to QQ+, AK for that unless villain is pretty loose or aggro. In this case I don't think that applies. I think against this villain if we 4-bet we fold out everything we beat (except maybe AK) and everything that beats us shoves.

I think raising the flop is a decent option too, but I'm not sure what is best. With the I would definately raise. I would probably call flop and hope for a good turn. This turn isn't great so I woudl check behind.