My Head is Still Spinning

[Lestat]

Online Party 30-60. My stats on sb thru 650 hands are 20.3/11.9/1.71 and seems to play well.

Cutoff raises, sb calls, I make it 3 bets from the bb with JJ.

Flop comes 663 with two diamonds. sb checks, I bet, they both call.

Turn is an off A. sb checks, I bet, cutoff folds, sb check/raises. I'm suspicious he doesn't have an ace and re-raise. He calls.

The river is another 6. He checks, I check. I lose to KK.

Was I outplayed? Never mind. Of course I was.