I think the songs basic meaning is about lost love. The girl was in love with this mystery man the song talks about, but somehow she lost him, and she loves him so much, that she'll never be able to fall in love again. Looking at it more deeply, it's also about how the girl doesn't even realize her own loss, or is chasing after something (the man/lost love) despite the fact that it's already gone.
I think the songs basic meaning is about lost love. The girl was in love with this mystery man the song talks about, but somehow she lost him, and she loves him so much, that she'll never be able to fall in love again. Looking at it more deeply, it's also about how the girl doesn't even realize her own loss, or is chasing after something (the man/lost love) despite the fact that it's already gone.