AK line help

[EricW]

Please help on this hand as I don't know if I played it correctly. Villain is pretty donky. Over 200 hands, he's 62/37. Total aggro is 2.59, flop aggro is 2.6, turn aggro is 2, river aggro is 6. (btw, no notes on orginal raiser)

Here's the hand:

Full Tilt Poker
No Limit Holdem Ring game
Blinds: $0.25/$0.50
5 players
Converter

Stack sizes:
UTG: $66.35
CO: $78.95
Button: $53.25
Hero: $50.50
BB: $47.25

Pre-flop: (5 players) Hero is SB with A[img]/images/graemlins/club.gif[/img] K[img]/images/graemlins/diamond.gif[/img]
UTG folds, <font color="#cc0000">CO raises to $2</font>, Button calls, Hero calls, BB folds.

Flop: K[img]/images/graemlins/heart.gif[/img] 7[img]/images/graemlins/diamond.gif[/img] 6[img]/images/graemlins/diamond.gif[/img] ($6.5, 3 players)
<font color="#cc0000">Hero bets $4</font>, CO calls, Button calls.

Turn: 6[img]/images/graemlins/spade.gif[/img] ($18.5, 3 players)
Hero checks, CO checks, <font color="#cc0000">Button bets $14.5</font>, Hero calls, CO folds.

River: 8[img]/images/graemlins/club.gif[/img] ($47.5, 2 players)
Hero checks, <font color="#cc0000">Button is all-in $32.75</font>, <font color="#cc0000">Hero calls all-in $30</font>.
Uncalled bets: $2.75 returned to Button.

Results:
Final pot: $107.5

I'm completely lost as to what I'm supposed to do. Please help out a noob.