I think it's about battling depression and losing the one person you depended on. Everyone around him is telling him that he's 'above it' and can fight it on his own but he doesn't want to accept the fact that he's depressed. He talks about how this has been ongoing for years and he can't stop clinging to the past but as the song progresses he starts to believe that there is hope for him and he finds the strength to let go of his history.
I think it's about battling depression and losing the one person you depended on. Everyone around him is telling him that he's 'above it' and can fight it on his own but he doesn't want to accept the fact that he's depressed. He talks about how this has been ongoing for years and he can't stop clinging to the past but as the song progresses he starts to believe that there is hope for him and he finds the strength to let go of his history.