Raising this flop is fine - he'll bet a lot hands you beat. But when he 3-bets this drawless flop you can be almost sure you're behind (a passive player won't 3-bet here with something you beat like KJ; A8). But getting 12 to 1 on the flop calling is still good.

I think he has something like K8, 44, 88 after he leads this turn. You're getting 7 to 1 from the pot here and most of the time youre drawing to 2 or 3 outs - you can fold here.
You'll have to pay 2 bets to see the showdown and the pot will contain 10BB in the end - I doubt a passive player will overplay an 8 or a weaker K against a pfr and flop-raiser more than once in 6 times.