@Pippinwhite -- I joined a sorority, and was sort of active, but I never felt about it like some of the girls did. I liked it, but it was never my whole life, and I had friends outside the whole sorority system, which wasn't always the case with the other girls.
In the real world, I seem to have a couple of close friends, and I get along well with my co-workers, but I'm not very, very close to many of them. So, I guess I have a low to moderate need of affiliation. I am kind of a loner at home. I can really go either way, but I do need a lot of solitary time to be happier.