Hi and welcome to FTR, it's good to have you here!

I would make it 350-400 to go preflop, then open shove the flop. Don't give a free card on the flop - a) opp indicated he likes his hand preflop and there are no real scarecards on that flop and b) you will feel sick if you give a free card, the turn comes 8 or K and he has QJ.

Otherwise, I agree with the others, you got your chips in as an 84% favourite preflop and an 80% favourite on the flop, keep on getting your chips in good like this and you will make money over the long run.