I think this song is about how she gets into a relationship with someone she never thought she'd be with and her life suddenly becomes all about him. In the song, she's calling him "her religion" because she can't live without him because he took over her life. In other words, she enters an mentally abusive relationship with someone who becomes her whole world, destructing everything around them.
I think this song is about how she gets into a relationship with someone she never thought she'd be with and her life suddenly becomes all about him. In the song, she's calling him "her religion" because she can't live without him because he took over her life. In other words, she enters an mentally abusive relationship with someone who becomes her whole world, destructing everything around them.