Villian is TAG, he has me as LAG. Pretty obvious that he has a flush or set. I'm ~130bb, he covers. What to do?

PokerStars No-Limit Hold'em, $1.00 BB (8 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

BB ($217.95)
Hero ($137.60)
UTG+1 ($123.85)
MP1 ($79)
MP2 ($27.45)
CO ($256.30)
Button ($123.95)
SB ($75.50)

Preflop: Hero is UTG with A, A.
Hero raises to $4, 1 fold, MP1 calls $4, 1 fold, CO calls $4, 2 folds, BB calls $3.

Flop: ($16.50) 5, 6, K (4 players)
BB checks, Hero bets $10, MP1 folds, CO folds, BB raises to $44, Hero ???