Young Love, Shattered: Happy TV Engagements That Ended in Total Disaster

Lovebirds: King Joffrey (Jack Gleeson) and Sansa (Sophie Turner)
Show: Game of Thrones
How it went wrong: Truly believing that she loved her fiance, this teen betrayed her father in order to keep her engagement intact. So how did her soon-to-be-king fiance thank her for her loyalty? But imprisoning her father, and ultimately sentencing him to death, of course! He then went on to humiliate her, threaten her, and order his knights to beat her... before ultimately deciding to ditch her for a woman from a more powerful family. What a great guy.