Why bet so little on the flop? Not a good spot for a weak flop bet whatsoever. I think I just bet more on the flop and give up if he calls. If he calls a bigger bet on the flop, he isn't going away with whatever he has often enough to warrant firing the second barrel, especially given his stack size. Your play looks like a set, but I'm not sure you are going to convince him often enough. Then again, I wouldn't make the weak bet with a set here either.