This is a time to trust your read preflop and raise that sucker up. He doesnt have the flush since he wouldnt cap that turn. He doesnt have K4,K3 since he wouldnt 3-bet that preflop. The only hand I can put him on that beat you is 33(I 3-bet this in the bb). So that would fit perfectly. I think he has the same hand here, AA or KJ.