How dumb did i play this AK ?

[TheBad]

I´m a big looser with hands like this.. Help me improve my play.

PokerStars 0.10/0.20 Hold'em (7 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

Preflop: Hero is UTG with A[img]/images/graemlins/heart.gif[/img], K[img]/images/graemlins/spade.gif[/img].
<font color="#CC3333">Hero raises</font>, MP1 calls, MP2 calls, CO calls, <font color="#666666">2 folds</font>, <font color="#CC3333">BB 3-bets</font>, <font color="#CC3333">Hero caps</font>, MP1 calls, MP2 calls, CO calls, BB calls.

Flop: (20.50 SB) K[img]/images/graemlins/diamond.gif[/img], T[img]/images/graemlins/heart.gif[/img], 8[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(5 players)</font>
<font color="#CC3333">BB bets</font>, <font color="#CC3333">Hero raises</font>, MP1 folds, MP2 folds, CO calls, BB calls.

Turn: (13.25 BB) 7[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(3 players)</font>
BB checks, Hero checks, CO checks.

River: (13.25 BB) 5[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(3 players)</font>
BB checks, <font color="#CC3333">Hero bets</font>, CO calls, BB calls.

Final Pot: 16.25 BB

PF: I don´t like to cap AKo, but here i have a (very small) chance to make someone fold PF, plus if there is a K on the flop, it will be easier to make my opponents fold.

Flop: Isoraise

Turn: Is there a flush ?

River: No ? Then i bet for value.