Too quickly too soon?

Josey
So I've been speaking to this guy since september but haven't met up in person yet. but will be in like a week for some casual fun. Is it possible that I could already develop feelings for him even though I havent even met him yet? for example, through our messages he tells me things that makes me feels as if im already his gf and tells me about his past relationships. How do I end our casual hookup next week without making things awkward and let him know that I'd still like to see him again? I know I haven't met him yet but I already feel like I know him... It's strange..