Lyric discussion by SteveTheLisener 

Cover art for Unhappy lyrics by Thriving Ivory

"Must have been around midnight, There's a ghost at the door She said please go slowly, cause we've all been here before"

I think that the "ghost" is who the girl fears to be the mean exboyfriend outside the home of the singer. She, as a result, is scared and wants to stay over night.

Actually, the line about the ghost at the door is misquoted from another song ("Still" - Thriving Ivory) and does not belong to the song at all.