To me, this song is about how he is on and off with this girl that he loves. She's pulled him in again, and he couldn't resist it, because she is all he needs.
But she lets herself go, she drinks, doesn't show respect to herself, but she just needs to let it all go.
And writing is helping her let it all go, and becomes the new saviour, saving herself from herself.
He wants to do all he can and help her, but she just goes back to who she was, "back in her skin."
To me, this song is about how he is on and off with this girl that he loves. She's pulled him in again, and he couldn't resist it, because she is all he needs. But she lets herself go, she drinks, doesn't show respect to herself, but she just needs to let it all go. And writing is helping her let it all go, and becomes the new saviour, saving herself from herself. He wants to do all he can and help her, but she just goes back to who she was, "back in her skin."