I think it is too early to decide if you want to be with him, let alone have babies. People on internet can be very different from what they are in real life. I think you need to OBSERVE him for a while first, I would say at least a year. You never know what he truly is behind the screen and the phone. Your feeling of being scared is justified, don't rush into anything just because you or he want to find a mate. All in all, my advise to you - BE CAREFUL!!