The song is completely paradoxical. We gain some insight about Justin and his relationship with possibly Selena, assuming that this song is about them. We learn that he was or is hurt by it and he’s trying to move on.
He’s shifting the blame and responsibility for their downfall to her or at least pointing out the parts of the relationship he didn’t like and making her seem very superficial only caring more about appearances than about him.
It’s a very catchy tune, quickly becoming one of my favorites for sure. I hope you enjoyed this philosophical analysis, if any of the parts mean something different to you please feel free to add a comment, I would love to hear your take on it. Philosophy isn’t about what the song “actually” means but rather what it “could” mean to each individual listener.