No, a bet is clearly necessary. I bet 2/3rds pot and he folded.

As vinland suggested, I was attempting to hit more of his calling range. But reading the comments and some other concepts I've read, 2/3rds is probably not large enough here. His calling range is only so wide...half the time he's on a draw, so no chance to extract anything else anyway. If he's calling 2/3rds, he's probably calling a near-pot sized bet.