AnnieSanitago: The Camino is all of those things you postulated. It is a sort of a "good" disease - "Caminoitis." It manifests itself by the "madness" of refocusing your entire life around all aspects of the Camino - the one you just completed - and the future Caminos you hope or plan to do.
It encroaches (in a good way) on most aspects of your "normal life." Many pilgrims have blogged and posted here and elsewhere on the profound changes walking the Camino has made in their everyday lives.
You will also be prone to day-dreams and flights of fancy, where you can almost feel yourself back on Camino. I usually fall to sleep each evening thinking about the Camino. It is quite the trip actually. It is also love; an eruption of camaraderie, charity, hope, compassion, and a shared awareness and sympathy for all that the Camino ever was, is, and will be.
All said, enjoy it. There is no known cure. And, the only effective treatment is to do it again... Welcome to the club...