I have "They don't know you can't leave me, they don't hear you singing to me" written in my binder...
I think a lot of people find that line creepy... but it's not in my head. More like her lover has passed on, and yet some part of him will always be with her - the singing to me part I believe is like he's talking to her, maybe singing a lullaby or something. Telling her he's okay... right at the end of the song, I have this little clip that plays in my head - she runs around a corner in a forest, slips, and falls. The ghost of her lover appears, offering her a hand... she stands, then he holds out his hand in front of him and walks through her... except he doesn't come out the other side. So it's like he's living inside her... *claps* I love this song.
I wrote a music video for this song

... we start shooting in a couple of months. When we all finish, I'll post it here for all to enjoy! (really hope Amy sees it...)