Lyric discussion by zinkk 

Cover art for You lyrics by Regina Spektor

i believe this song is saying never rush to try and get over your love, unless you absolutely have to, because if you try to rush out of it it'll come back and bite you in the ass. They will then continue to haunt you becuase your love for them never really went away, you just forced it to the side.

"'Cause he will haunt your empty heart forever 'Til your body turns to dust"

and then you'll never be able to love another in the same way again.