[builtiz]

I agree with the gambler. Solid BB is not betting the river with no pair. If he was going to make a play on you he would have done it on the turn with a raise. He probably has some small pocket pair and wants to get paid off. My guess is that he put you on big cards and will probably call if you raise. Raising might throw him off though it really depends on his hand reading skills. I would fold and be done with it.