It always starts with one look from you; why does it end with my dreams never coming true?

Have you ever had one of those days where you miss someone so terribly much that you would give anything and everything just to see them?...that was my day the other day...I missed you so terribly much. Constantly dreaming of the day I'll get to see my earth angel again...

If my Christmas wish came true, then I should be happy right? Then why do I feel so sad?