I'm enjoying my time with this guy, but I'm afraid he's going to hurt me.

I've been seeing this guy for a few weeks now. I got out of a bad relationship about 3 months ago. Me and this guy have really been hitting it off and he's super sweet but I'm afraid he's just going to drop me and move on out of no where :( I think I'm being paranoid but I can't help but think that. Any tips?