Is this river push as bad as I think it is?

[Pokertastic]

CO is 30/14 and has gone to showdown 29% after 80hands

Party Poker No-Limit Hold'em, $ Hero (6 max, 6 handed) converter

CO ($32.80)
Button ($25.25)
SB ($35.15)
Hero ($25)
UTG ($123.40)
MP ($29.35)

Preflop: Hero is BB with T[img]/images/graemlins/heart.gif[/img], K[img]/images/graemlins/heart.gif[/img]. SB posts a blind of $0.10.
UTG calls $0.25, <font color="#666666">1 fold</font>, CO calls $0.25, <font color="#666666">1 fold</font>, SB (poster) completes, Hero checks.

Flop: ($1) 5[img]/images/graemlins/spade.gif[/img], K[img]/images/graemlins/spade.gif[/img], 2[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(4 players)</font>
SB checks, <font color="#CC3333">Hero bets $1</font>, UTG folds, <font color="#CC3333">CO raises to $3</font>, SB folds, Hero calls $2.

Turn: ($7) K[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>
Hero checks, <font color="#CC3333">CO bets $3</font>, <font color="#CC3333">Hero raises to $6</font>, CO calls $3.

I wasn't too sure what to do; my hand is too strong to just call but not strong enough to push so I just minraised it like a donk.


River: ($19) 6[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
Hero calls $15.75 (All-In), CO calls $15.75.

Since he never reraised my minraise or raised preflop I put him on a weak suited king. I didn't think he had a flush draw because he usually played them much more passively, the standard check/call then raising the river.

Final Pot: $50.50

In any case, feel free to berate my play.