Villain is 18/16/2.1 tagg who is pretty standard post flop n only thing I've seen him getting out of line is preflop 3betting wars. Not sure what to do here on the turn.

Bet small like $5.50ish and get him to spazz out with worse? Or is that wishful thinking?
Shove the PSB I have left?
Check behind?

Any comments on PF and flop?

PokerStars No-Limit Hold'em, $0.50 BB (6 handed) -

SB ($28.05)
BB ($21.40)
UTG ($80.10)
MP ($25.35)
Hero (CO) ($25)
Button ($25)

Preflop: Hero is CO with ,
1 fold, MP bets $1.50, Hero calls $1.50, 3 folds

Flop: ($3.75) , , (2 players)
MP checks, Hero bets $2.50, MP raises to $6.50, Hero calls $4

Turn: ($16.75) (2 players)
MP checks,