Aferrado means “clinging” or “holding on tightly,” especially when it is difficult to let go emotionally. In the song, the singer says he would rather suffer his lover’s departure than remain aferrado a tu amor, vividly describing someone desperately holding onto a love that is ending.
This is a breakup song where the singer chooses to walk away with his pride intact. He opens calmly: "Está claro que ahora sí te vas a ir" (It's clear that now you really are leaving), and decides he would rather "sufrir un par de meses tu partida" (suffer your leaving for a couple of months) than spend his whole life clinging to her love. He also warns her that if he goes, "es para siempre" (it's forever).
The chorus is where it hurts. He remembers how "como a nadie en este mundo, me entregaba" (I gave myself to you like to no one else in this world), admits that losing her is hurting him, and still tells her "es mejor que te vayas" (it's better that you go). Then comes the parting shot that gives the song its title: a love like his "no te llegará dos veces" (won't come to you twice). It's salsa heartbreak with a bit of a sting at the end.