To me, the song sounds like he's come to realize how she sees the world, full of cynicism and disinterest - doesn't really stop to smell the roses, that sort of thing. He's into her and she SAID she's into him too, but possibly right now the feelings changed. You can feel his frustration as the song progresses, how she's slipping away, or rather, he realizes that she isn't good for him, probably not into him anymore, how she's "burying" him and no one can help. So he's just wasting away.
To me, the song sounds like he's come to realize how she sees the world, full of cynicism and disinterest - doesn't really stop to smell the roses, that sort of thing. He's into her and she SAID she's into him too, but possibly right now the feelings changed. You can feel his frustration as the song progresses, how she's slipping away, or rather, he realizes that she isn't good for him, probably not into him anymore, how she's "burying" him and no one can help. So he's just wasting away.