I absolutely love this song. It's one of my favorite songs after hearing it one time. From the melody and her voice makes everything flow together beautifly. So many of us can relate to it in some form or fashion.
Many look at it as just about romantic love, but it can be anything that we can live without. But we just "can't". This song can have a meaning to anyone from relationships that aren't going anywhere. Substance abuse and anything that keeps us in an addicted state of anything that brings us down.