Learning to Walk Alone

I've been alone my entire life.  I don't mean that literally, of course.  I have a large family, a girlfriend, and a job that requires me to speak with people on a near-constant basis.  
When I was younger, I served in the Marine Corps. where I routinely shared a squad bay with 60 other men.  And when I worked as a farmer's apprentice, I shared a bunkhouse with 5 other people.
So, it's rare that my aloneness has been of a physical kind.  Rather, it is in the mental and spiritual realms that isolat...