Ok, so this could be the delirium talking because I haven't slept, but I have new thoughts on these lyrics. I always thought of this as her singing to someone else, someone external. But I thought just now, and especially with the video -- is she talking to herself? what I mean is that is seems like she is telling herself all these things --that it's not too late to change the pace, that love will come back to her, and that beauty surrounds her and is inside of her. The lyric "I know she let you down" still works, one because she is bisexual, and two, she could still be talking about herself -- her old self, that she who got off track and was letting herself down. The song has taken on a new meaning for me of self affirmation or self lullaby to reassure herself that it will all be ok and that love will come back to her as long as she keeps putting it out there and as long as she keeps recognizing the beauty around and inside of her.
during the last part of the song where she interchanges "I" instead of "you" ("all I hear is the music") seems to affirm all that she was telling herself during the song.
This probably won't make sense.. sorry for rambling.!