The singer thinks back at how boring and meaningless her life was in the days "before you came". You in this setting is her lover. After her lover entered her life, it all changed and had meaning for the first time. All happy then? No, it is not the narrative but the music that gives it away. Her lover has left her. She lies in bed, depressed and listning to the rain as she has done so many times before. She thinks through her day and realizes she is back exactly where she was before she met her lover. And it is first now that she understands that she is depressed, now she realizes her life is without aim and meaning.
This song is so sad! Here is my interpretation:
The singer thinks back at how boring and meaningless her life was in the days "before you came". You in this setting is her lover. After her lover entered her life, it all changed and had meaning for the first time. All happy then? No, it is not the narrative but the music that gives it away. Her lover has left her. She lies in bed, depressed and listning to the rain as she has done so many times before. She thinks through her day and realizes she is back exactly where she was before she met her lover. And it is first now that she understands that she is depressed, now she realizes her life is without aim and meaning.