You Belong With Me by Taylor Swift is a country pop song about unrequited love and longing. The song tells the story of a girl who is in love with a boy who is already in a relationship with someone else. Despite their close friendship and her belief that she understands him better, the boy doesn't see her as a romantic partner. Key themes include unrequited love, longing, friendship, and self-realization. Poignant moments in the song include lines where the protagonist describes feeling overlooked and expresses her deep understanding of the boy's true self.