From the girl's point of view. She talks about how much she's loved being together, she knew she couldn't keep her lover for herself since he was so popular. She reculantly accepts that they have to part ways but hopes that he keeps remembering their realtionship as something special.
From the guy's point of view. He thinks back on his girlfriend's constant cheery mood and talkativity and her habit to call him "stupid". In the end when he sees her crying and is unable to understand why, he can't help but agree with her calls himself stupid. He hopes that he'll meet her some day again, yet it hurts so much that he hopes he can forget her as well.