[iggymcfly]

I'd bet 1/2 pot to 2/3 pot on the turn. If villain's drawing, he can still hit a ton of cards to beat you, and he easily could have something like a flush draw or wrap at this level in addition to a 2 which would have lots of outs. As played, call the river just in case he's misreading his hand and thinks that a weak 2 is good for something.