I like to think of it as a woman who loved someone and thought she would be with them forever, but they left her. In her psychotic lonely misery all she thinks about is her past with him and these memories becomes her world (the present). I think she's singing to him how much she really needs her lover still, and that she wants to show him how much it's affected her, and she's reminding him how entirely she loves him as she always did.
I like to think of it as a woman who loved someone and thought she would be with them forever, but they left her. In her psychotic lonely misery all she thinks about is her past with him and these memories becomes her world (the present). I think she's singing to him how much she really needs her lover still, and that she wants to show him how much it's affected her, and she's reminding him how entirely she loves him as she always did.