Oops, I read the hand wrong; I thought you were the preflop raiser. Still, he could just as easily be betting with a made hand rather than cbetting, though the fact that he was the preflop aggressor does open his range up a bit from what I had considered, I think.

I'm also not sure how much you should be considering your own table image at 2NL. If you've got reason to think your opponent is solid then you can consider your image, but don't try to get too tricky or you'll just level yourself.