well, im assuming here that if he is going to be calling a potsize bet on the river, then he will most likely call a re-raise on the flop.

Another reason why i re-raise here is because theres a possible flush draw on the board. I feel that there is a need to protect your hand whenever it can be outdrawn - however slim it is, there is a chance this guy could also be holding AK suited of hearts. This is why i re-raise.

Also, I would have bet this turn as well instead of checking. If this guy has pocket aces, and has the ace of hearts, then ur just gonna be giving him a free card to make his flush. If this guy has pocket kings, that would mean he just hit his set, and would probably raise you on the turn (therefore helping u to build the pot on the turn). I would say that on the flop, if this guy was a good player, he would have put you on either a set or QQ. From the way u played that hand preflop, and on the flop, it is hard to put you on TJ, or 2 pair.