If the turn didn't improve you, lets say it was a 7instead, what do you do?
I'd ship it on any blank river. When villain flats flop instead of shipping himself, I find it hard to put him on a strong made hand {KJ or set}. He's most likely to show you a draw himself, or a weak 2 pair (unlikely on this board!). Against those hands, we would be happy for him to fold because he does have equity, but if we get it in we're in fine shape (and maybe even ahead!).

instead, what do you do?