Bad bluff?

[Rooger]

Villain is TA - around 15/4/4 the hands I have on him.
I have seen him raise with AA & KK, and coldcall a raise with 33 (stacked a fish when he hit set).
Villain probably sees me as TA too - he has seen me raise KK.

PokerStars No-Limit Hold'em, $1.00 BB (5 handed) FTR converter on zerodivide.cx

Button ($322.05)
Hero ($128.20)
BB ($19.05)
UTG ($62.15)
MP ($11.85)

Preflop: Hero is SB with A[img]/images/graemlins/diamond.gif[/img], J[img]/images/graemlins/diamond.gif[/img].
<font color="#666666">1 fold</font>, <font color="#CC3333">MP raises to $3</font>, Button calls $3, Hero calls $2.50, BB calls $2.

Flop: ($12) 5[img]/images/graemlins/diamond.gif[/img], K[img]/images/graemlins/spade.gif[/img], 5[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(4 players)</font>
Hero checks, BB checks, MP checks, Button checks.

Turn: ($12) 2[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(4 players)</font>
Hero checks, BB checks, MP checks, <font color="#CC3333">Button bets $6</font>, Hero calls $6, BB folds, MP folds.

River: ($24) 7[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets $15</font>

Good move, or spewing?