Maxiom's comments are *spot on* about this guy. Beware.
But it's funny/ironic that you posted this today b/c I've been mulling over in my mind this NB thing of being open and ready to allow people in backed up by strong boundaries that recognizes when people just aren't on the up & up. I think that that is one aspect of NB for all of us (whether we're actively wanting another relationship or not). We're all here b/c we were had. And nothing creates self-doubt than realizing that someone made of fool of you when all you were doing was loving them.
I think it's good you're seeing you're ready to be open to new people in your life. It's just important to back that up with being smart about it. This guy needs to be "next-ed". And that's part of what being open to new people is all about. Separating the wheat from the chaff and trusting your own judgement. Imho you know this guy's no good, that's why you find yourself posting about it. So next him, and look around. There are definitely some awesome people in this world.