I think it describes how you feel after someone you've known for a very long time and were very close to, like a best friend, that you thought would be one of the few people to stick by you for the long haul, leaves your life. You feel lost, alone, like you don't really know anyone anymore and that you have nobody to depend on or confide in anymore. It's a horrible feeling...but a beautiful song, anyway. :p
I think it describes how you feel after someone you've known for a very long time and were very close to, like a best friend, that you thought would be one of the few people to stick by you for the long haul, leaves your life. You feel lost, alone, like you don't really know anyone anymore and that you have nobody to depend on or confide in anymore. It's a horrible feeling...but a beautiful song, anyway. :p