Quebranto literally means 'breakage' or 'damage', but in a more poetic sense, it refers to deep sorrow, heartbreak, or emotional distress. It's a less common word than 'tristeza' (sadness) or 'dolor' (pain), making it more impactful.
In the song, the lyric "Y otro sane tu quebranto" (And another heals your heartbreak) uses quebranto to describe the profound emotional wound left by the relationship's end. It beautifully conveys the idea of someone else mending the brokenness of the heart, adding a layer of depth to the song's theme of moving on.
This is a breakup song that refuses to name a villain. It opens with the relationship already finished and says so plainly: "Se nos acabó el camino" (our road ran out on us), "Se nos fue secando el río" (the river dried up on us). Then comes the part most breakup songs skip. "No hay culpables en la historia" (there are no guilty parties in this story), "No te apunto con el dedo" (I'm not pointing a finger at you). His whole verdict on the relationship is three words of Mexican shorthand, "Simplemente no jaló" (it just didn't work), and that is the end of the argument.
What he keeps is the accounting. "Cada risa, cada beso" (every laugh, every kiss), "Cada pinche madrugada" (every damn early morning), "Valieron toda la pena" (they were all worth it). He is honest about what she had to live with, "Con mi genio y mi locura" (with my temper and my madness), and he asks for exactly one thing in return: that some day, thinking back, she says it quietly to herself, "La neta sí me amaba" (the truth is, he really did love me). Somewhere in the middle he raises a glass to himself, "Y, salud, por esas malas decisiones" (and cheers, to those bad decisions), and shouts out the band, which in any other song would be a mood-killer and here fits perfectly.