Dictionary.com defines "society" in this way:
1. an organized group of persons associated together for religious, benevolent, cultural, scientific, political, patriotic, or other purposes.2. a body of individuals living as members of a community; community.3. the body of human beings generally, associated or viewed as members of a community: the evolution of human society.4. a highly structured system of human organization for large-scale community living that normally furnishes protection, continuity, security, and a national identity for its members: American society.5. such a system characterized by its dominant economic class or form: middle-class society; industrial society.
So, by definitions 1, 2, and 5 I do live in a libertarian society. I even live in a libertarian society according to definition 4, if you don't emphasize the "highly structured" part too much. Structured, yes. Highly structured, probably not. And that isn't a weakness, but a strength.
I'm still not sure about definition 3. I doubt there is any such thing as "human society" since beyond the biological and psychological basics there is no singular "society" that is common to all humans. Yet, in day-to-day interactions, humans do generally behave in a libertarian (and even anarchist) manner. Otherwise no one would be able to get along at all; everyone would just be stealing, attacking, and shoving each other around every time they encountered another person. Civilization, not to mention "society", would come crashing down.
So, yes, I do live in a libertarian society. Of my making and of my choosing. Those who don't attack me will not be attacked by me. My libertarian society is surrounded by a parallel (and inferior) society that is based upon coercion, but that is not my society. I am not a part of it, even as I must deal with it. The disease is not me.