AA facing river push

Opp. is 19.75/12.35/3.03 after ~400 hands. For ya regulars he is TableATM. I had lots of thoughts on the river and got confused. My thought at that time: No way he has a flush here unless he had a pair + flush draw I don't think because he wouldn't draw with such sick odds. A set is possible but I would think he doesn't want an action killer to come on the river and likely raises the flop if not the turn so he doesn't have a set often at all. 2 pair maybe but what 2 pair can he have? Can he have a 10 and just count the spade as a bluffing out? Soooooooooo after using my timebank up, I called.

PokerStars No-Limit Hold'em, $1.00 BB (6 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

SB ($82)
BB ($100)
UTG ($229.70)
MP ($167.75)
CO ($131.50)
Hero ($111.75)

Preflop: Hero is Button with A, A.
UTG calls $1, 2 folds, Hero raises to $5, SB calls $4.50, BB calls $4, UTG folds.

Flop: ($16) 3, T, 7 (3 players)
SB checks, BB checks, Hero bets $12, SB folds, BB calls $12.

Turn: ($40) K (2 players)
BB checks, Hero bets $30, BB calls $30.

River: ($100) 8 (2 players)
BB bets $53 (All-In), Hero calls $53.

Final Pot: $206

its probably a breakeven call, not much better or worse. I don't see how he can call the turn with a hand you beat if he's solid and then decide his best play is to turn this hand into a bluff. It's possible though.

Against the villain you described this river call is highly -EV. Looks like a combo draw that got there on the river.

You're only beating a bluff.. fold.

That sucks =( I hate this situation.