The single was originally due out in January 2004, but was released a month early in an attempt by Terry Wogan to make it that year’s Christmas number one in the UK. The single reached only number ten in the UK charts. However, owing to the success of the album reaching number one, the song climbed back into the top 20 during the January and February period, and resulted in obtaining Katie's first nomination for the annual The Record of the Year prize on ITV1. She was to be nominated again at the ceremony the following year for Nine Million Bicycles, but lost out to Busted and Westlife respectively. She did however finish in the top 5 of voting for both years.
The lyrics of the song take the form of a series of rhetorical questions, describing the contradictory emotions of being in love. It appears that the object of the singer's love treats the singer unkindly, and may not return the emotion.