Lame-o in the background just got rejected brutally by girl in the front. Their love turned to hate, and their resentment formed a shadow figure that would haunt her the rest of her life. However, eventually the shadow figure falls in love with the girl too, so instead of being a curse it becomes a sort of guardian angel, protecting her from most harm.

A girl got possessed and turned down a date with a guy she loved

And then she ate some milk duds