[pokernicus]

I think you can fold and sleep well. You've been nothing but aggressive this hand which implies that from your opponent's perspective, you have a strong enough hand to have a reasonable probability of calling a river raise. It doesn't sound like you've both been at the same table long enough for him to have enough of a read on you to attempt such a fancy move.

Later on, you might want to mix it up by calling this type of hand down every now and then so someone doesn't actually try a bluff of this sort against you.