I'm quite friendly with a couple of people on this site via emails/texting/calls who I haven't met up with. I've no qualms about meeting them in person so to speak, it's generally just distance that makes it tricky but if we were in each others orbit then I would anticipate that a coffee or vino would be in order. Much the same as if I was going to see relatives in another part of the country and had a friend in the same area.
That said, I don't have any romantic inclinations towards anyone, do you think that's what could be putting you off? Have you built an image up in to your head that you're worried they won't live up to?