This is a song about regret as much as loss. It is likely our protagonist if you will had the love of this woman who he mistreated in some way to lose that love. Perhaps he took her for granted figuring she would always be around. Maybe he had too much pride to admit how much she meant to him and she simply moved on. He obviously treated her more like a possession that a person. No that he realizes his mistake, she is long gone. There is deep regret conveyed through this lyric. Powerful.