I would say just tell her what you feel comfortable telling her and see how it goes. You're not locked into a lifetime thing here. It's not a mortgage.

As for your not liking people very much, I have to tell you that I have been struggling with how to start a thread the topic of which is basically my distaste for a large percentage of the population. But I'm afraid to share it, because I'm afraid people will think I'm a jerk. I still may do it. Anyhow, You are not alone in this and I just wanted you to know that.