Wondering how bad a fold this was by me.....

Ok, was in a live tournament for £50 double chance freezout. 108 players. I had about 11000 chips just above average with just under half the people left (cant really remember).
Had AsQh unsuited middle position, first to act, raised 4x BB. One caller in the SB. He was an aggressive player who had built up a very large chip stack. I hadn't played a hand against him as yet, having recently moved tables.
Flop came 10cJd4c.
He checked to me very quickly. I made a normal continuation bet of half the pot. He calls after a bit of deliberation.
Turn Kh.
Had a straight. He checked again very quickly. I thought he might have had a flush draw so i bet the pot. He calls again. At this point i still put him on a flush draw, maybe the king giving him a straight draw too.
So river came Ac. He goes all in. Putting me all in. I folded.
He flips one card, 10 of spades.

Thoughts??

Sorry but I'm never folding here, it just smells of a bluff, or QT? I don't think you're ever beat here fwiw

never folding either

sorry

No offense, but bad move. Just the way you described him proved that it was bad.

hope you still cashed

if you know hes aggressive there are so many hands that he could be shoving that river with. any Q,AK,AJ,A10,J10,K10,A4,any set and a flush. most of the time he doesnt have the flush and you said it yourself hes aggressive and hes probably full of himself cause he probably got that stack making poor plays like this and people folding to the pressure. Should have made the call sometimes your losing your stack but i would say most of the time your splitting or taking that pot.