Quiérete is the informal command form of "to love oneself." It's a direct and empowering call to action, which is central to the song's message of self-love and moving on from a toxic relationship.
While "querer" (to want/to love) is common, the reflexive command "quiérete" is less frequent and stands out as the core theme of the song, making it both memorable and highly relevant to the lyrics.
Luana takes Justin Bieber's "Love Yourself" and rebuilds it in Spanish as a clean, unbothered goodbye.
The verses set out what went wrong. Every time she was hurt, the answer was another argument. Her partner tried to cut her off from her friends and from her own opinions, and her parents saw through him long before she did. She admits she was blind to it for a while, and that the damage ended up making her stronger rather than breaking her.
The turn comes when she decides to stop writing about him at all, because she does not want anyone thinking she still cares. That is what makes the chorus land. If she never made him happy, and he really does look better without her, then good luck, go and love yourself.
It is a breakup song with no shouting in it. The point is not revenge, it is walking away and meaning it.