A good question to ask I guess is, what would be calling/betting with that I beat.

What would he have called with you on the flop and raised you when a 2nd 8 hit? My first thought would have been "fuck" and folded without a strong read.

In this case, unless you think he'd make this move with Ax (x not being 3 or 8) or a pocket pair, you're losing...you only beat a total bluff really