I don't think a nit will raise you here unless he has Q-8 beaten. You led at a paired board twice so he's not raising you with a PP, he'd most likely just call it down. 8-10 is the best trips you're beating, do you think he would raise you here with that? I'd say he's gonna show you 33 or A8 more often than not. There's no shame in folding the worst hand.