HU w/ Overcards

[elbuddha]

Hopefully this hand is boring and standard. But I'm suffering a 150BB downswing over 2000+ hands, and am questioning every move I make.

Villian seems kinda loose but not a maniac, and is capable of being aggressive.

PokerStars 0.25/0.50 Hold'em (9 handed) converter

Preflop: Hero is MP3 with K[img]/images/graemlins/club.gif[/img], A[img]/images/graemlins/diamond.gif[/img].
<font color="666666">2 folds</font>, MP1 calls, MP2 calls, <font color="CC3333">Hero raises</font>, CO calls, <font color="666666">3 folds</font>, MP1 calls, MP2 calls.

Flop: (9.40 SB) 9[img]/images/graemlins/diamond.gif[/img], 7[img]/images/graemlins/heart.gif[/img], 3[img]/images/graemlins/diamond.gif[/img] <font color="blue">(4 players)</font>
MP1 checks, MP2 checks, <font color="CC3333">Hero bets</font>, CO folds, MP1 folds, MP2 calls.

Turn: (5.70 BB) T[img]/images/graemlins/spade.gif[/img] <font color="blue">(2 players)</font>
MP2 checks, <font color="CC3333">Hero bets</font>, MP2 calls.

River: (7.70 BB) J[img]/images/graemlins/club.gif[/img] <font color="blue">(2 players)</font>
<font color="CC3333">MP2 bets</font>, Hero folds.

Final Pot: 8.70 BB

Maybe not auto-bet the flop?
Maybe not bet the turn?
Maybe not fold the river?