When I heard this song as I was browsing around the internet, my thoughts trailed back towards Sasuke Uchiha. In a way, this song can relate to him. He's falling into the black, the darkness, and the wrong path in life instead of being a sucessful shinobi. It all starts out when his entire clan is massacred by his older brother and then only gets worse when Orochimaru gives him the Cursed Mark, and gets bad to the bone when Sasuke leaves to go with Orochimaru.
He thinks about how his life has been so far and thinks back on his friends. In a way he doesnt want to be with them but at the same time he does. Its complex but once you really pay attention to the words and the video, you'll get the meaning. Another video I absolutely love. Enjoy