Do I fold somewhere?

[Drontier]

I've been involved in every other hand for the last few orbits. I'm guessing this makes my image pretty aggro. 22/15 is villain who has played very standard so far, but I haven't seen him play for more than a few hands even though his stats make him seem very abc. No idea if he is adjusting to me huge recent aggression.

He opens from MP and I 3-bet KK, he caps.

Flop AQ9 r
He bets, I call
Turn 7
He bets, I call
River J
He bets, I call

On the river I don't really see a hand I beat. I have no idea if he can adjust and open up his range though. Is this standard? Flop fold? Turn fold? River fold? Call down?

[spamuell]

I'd fold the river, both because the J massively reduces the number of hands that you beat and because a lot of the hands you beat that he'd bet the flop and turn with, he could well check the river with, especially because that J is scary for him too.

[mscags]

I'd probably fold the river, that J just kills your hand and unless you have him pegged as very aggressive he is probably going to be c/c that river like spamuell said. Tough fold, but probably the right one.