I think him having A8 is far fetched because he raised you on the flop. With no reads or stats is hard to put him on that wide of a range. What hands would he raise you on the flop? 2pair, pair w/flush draw or a pair w/straight draw, Strong Ace which would give him a Gutshot. Is it possible he limped JJ's or 10's tho probably unlikly. Without knowing his range and hitting your hand when your really only crushed by a few hands it tough for me to lay down that hand even tho it is for most of my stack.