This the second single from Speak Now. The rumor is that the song is an apology to Taylor Lautner for dumping him. Taylor Swift has not confirmed this.
In the music video, Taylor sings sadly in her kitchen, tub and her room. Meanwhile, Taylor's ex-boyfriend walks sadly in the cold. He is sits depressed on cold bleachers outside of a high school. Eventually it starts snowing on Taylor Swift in her home. Take a look: