I would bet the flop here too, pot size, but wouldn't fold if he raised. He only has a mediocre stack. Means he isn't a good player, however his luck is running.
You have a gutshot and two overs on a drawy board, IP as the PF aggressor. Definite contibet here. And call any push, because of his stack size and the fact that he could do it with a draw, if he was so inclined.
If he calls, you have an easy push on this turn.
EDIT: I would also push this turn as played, he can't really fold now, so get it in while you are the best.