have i played this hand like a div or what?

Herbie536

I recently was in a hand where i had pocket aces on the button, when the action came round to me i put a min raise in and was called by one person, the flop came KKK my opponant checked as did i, the turn came a 6 he checked so did i again, obviously i want my opponant to hit some kind of house to get some action, the river comes a 7 but again my opponant checks, at this point my train of thought is that my opponant couldn't have anything so i have to put a little bet in just to see if he calls with ace high or something, to my amazement he then raises me so i think he is thinking im trying to steal the pot or he has in fact hit a 6 or 7, hoping he's hit a 6 or 7 i push all in and he calls, to my astonishment he turns K5 so i lost to quads, was this bad play by me or was i justified by the line my opponant took.

I would appreciate some feed back as this hand is still annoying me a little