Fracasar means "to fail" or "to be unsuccessful." It's a strong verb that conveys a sense of defeat or not achieving a desired outcome.
In "Cuando Me Vaya," the artist sings, "Solo se ha escondido por su miedo a fracasar" (He has only hidden because of his fear of failing). This line reveals a deep vulnerability, suggesting that the character's hidden self is driven by a profound fear of not living up to expectations or making mistakes. It's a relatable emotion that adds significant depth to the song's narrative.
NSQK writes "Cuando Me Vaya" as an apology, not a breakup song. The person singing has hurt the people closest to him and knows it: "Mis maldades hacen daño más que nada a mí" (my wrongdoings hurt no one more than me). He's still asking his mother for grace even as he admits he can't keep living the way he has been: "Te prometo, sigo siendo tu bebé, mamá" (I promise you, I'm still your baby, mom).
The second half turns the apology into a goodbye. He doesn't recognize the person staring back at him in the mirror, "Veo una imagen que no es mía" (I see an image that isn't mine), and by the chorus he's already picturing being gone: "Que nadie se entere a dónde vas" (let no one find out where you're going), "Que se borren las memorias de ti" (let the memories of you fade). What he asks for at the end isn't understanding. It's forgiveness: "Espero que me sepas perdonar" (I hope you can forgive me).