Pétalos translates to "petals," the delicate parts of a flower. It's an evocative word that brings to mind fragility and beauty.
In the song, Denise Rosenthal sings, "Tu amor fue violento, rompiste mis pétalos uno a uno" (Your love was violent, you broke my petals one by one). She uses this metaphor to describe how a toxic relationship slowly and painfully damaged her, likening her emotional well-being to the delicate petals of a flower being torn apart. This imagery makes the word particularly poignant and memorable.
The song counts the cost of the relationship one line at a time. "Tu amor fue violento, rompiste mis pétalos uno a uno" (Your love was violent, you broke my petals one by one) — the damage arrives petal by petal rather than all at once, and what follows is the shrinking that came with it: "Vivía desde el miedo azul" (I lived from the blue fear), "Corriendo para no existir" (Running so as not to exist), "Tan diminuta como una hormiguita" (As tiny as a little ant). She names her own part too — "Yo me equivoqué / Al creer que te podía cambiar" (I was wrong / Thinking I could change you) — which keeps the song from reading as a simple accusation.
The title is the verdict, repeated until it holds: "el amor no duele" (love doesn't hurt). Against it sits the one thing she takes back, "Soy dueña de mi vida / De ahora en adelante no se me olvida" (I am the owner of my life / From now on I won't forget) — ownership stated as a fact she still has to remind herself of. The ending itself is almost offhand: "Por suerte nunca volverás" (Luckily, you will never come back).