Henry David Thoreau talked about how much he loved to be alone and Ann Landers once said that it's better to be alone than to wish you were...
I can tell you firsthand, after living in my new house for only a little more than a week. That, while I am good at being alone and have often preferred it to getting hurt, I was not made to be alone. Because I am keenly aware of this, I do my best to stay connected and involved in as many groups as possible. I keep my social schedule pretty packed too. So, I am rarely alone.
That said there is a big difference between being alone and feeling lonely. People talk about the sensation of feeling intensely lonely even when surrounded by people. I am very familiar with this. Right now, I find myself a member of three very distinct families, I have a work group and various cliques of friends but I feel profoundly lonely. And I feel incredibly alone. I don't think there's a soul out there who can relate to exactly to this phase of my life.
But man... it would be nice! Even just for a day... To not feel like I'm just going it alone.