Tough AA Hand

[La Brujita]

UB Wed 215. About 80 players left (375 or so started). 40 pay.

Blinds 200-400 ante 50. I am UTG with about 7800 chips (probably slightly below average and holding red aces.

I raise to 1000. Folded to BB who is a good player and flat calls with a stack around 9000.

Flop: J47r (pot 2650)

Checked to me and I bet 1300 (a bit less than usual, for reasons I will explain). He calls.

Turn: J47(J) (pot 5250)

He checks, I check behind.

River J47J(4) (pot 5250).

He bets 1500. At this point I have about 5500 in my stack. Ouch, thoughts?