[Turning Stone Pro]

PP 1-2 game. I have been playing well and my image is tight and aggressive (imagine that!). Solid player who I don't have crib notes on raises UTG+1. I three bet with QQ from MP. Fold around, he caps, I call.

Flop is AA4. He bets, I call.
Turn is a 5 (no flush concerns). He bets, I call.
River is a 7. He checks.

1) What should I do on the river?
2) How do you like the rest of the hand?

Thanks!

TSP