Villain's running 27/5 seems ok hasn't gotten out of line. Usually a decent villain will raise a flush draw but based on his stats I think he could have played it this way. Really not sure though, what do you guys think, did he have it or does my line look like a bluff and he took it away from me?

PokerStars No-Limit Hold'em, $0.25 BB (5 handed) Poker-Stars Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

Hero ($46.55)
Button ($28.15)
SB ($50.95)
BB ($83.65)
UTG ($24.55)

Preflop: Hero is MP with A, A.
1 fold, Hero raises to $1, Button calls $1, 1 fold, BB calls $0.75.

Flop: ($3.10) 4, 2, 9 (3 players)
BB checks, Hero bets $2, Button folds, BB calls $2.

Turn: ($7.10) Q (2 players)
BB checks, Hero bets $4.5, BB calls $4.50.

River: ($16.10) 6 (2 players)
BB bets $15, Hero folds.

Final Pot: $16.10