Desesperarme comes from the verb desesperar, meaning 'to despair' or 'to become desperate'. It's a strong emotional word that conveys a sense of losing hope or patience.
In the song, Jay Wheeler sings, "Que tanto esperarte empieza a desesperarme" (Waiting for you so much is starting to make me desperate). He uses this word to express the intense frustration and impatience he feels while waiting for his love interest, highlighting his deep longing and emotional turmoil.
Jay Wheeler spends this whole song trying to sound casual about someone he cannot stop thinking about. The trick sits in the hook: "Decir que todo bien cuando todo mal" (Say everything's fine when everything's wrong), so the title arrives as the second half of a lie he is telling out loud. Everything before it is him rehearsing that lie, from the breezy opening "Hola, mi amor, ¿cómo está'?" (Hey, my love, how are you?) down to "Yo, ¿cómo puedo ocultar? / Que no te extraño, bebé" (Yo, how can I hide it? / That I don't miss you, baby), which gives away the hiding in the act of denying it.
The break-up itself gets one line and a football joke: "Te fuiste como Mbappé de Francia" (You left like Mbappé left France). Abraham Mateo takes the second verse into what is actually gone, the private shorthand two people build and then lose, "Sin hablar, nos comunicábamo' por mímica" (Without speaking, we communicated with gestures). Then the chorus circles back to what he is really asking for, which is timing rather than reconciliation: "Porque quiero darte antes que vuelva a enamorarme" (Because I want to have you before I fall in love again). He is not asking her to come back. He is asking for one more night before it starts meaning something again.