AK ugh

[JJNJustin]

You have to call the river bet. The pot is so enormous and your hand is so strong. Some players might check-raise this river. If he is a good player the only three hands you have to worry about are 6666, KKK66, and AA66. Since you hold AK, KK and AA are less likely and most players will reraise preflop with KK and AA. Since quads is very unlikely and given his aggression on the flop (quads he would probably slow-play and even kings full he would probably slowplay) and given the size of the pot you have an easy call. Dont "decide" his river bet means he has you beat. You have a strong hand yourself, the flush didnt get there, and the pot is huge. Never fold here.

best of luck
-J