Aferrado comes from the verb aferrar, which means to grasp or hold on tightly. It's a powerful word that describes a desperate, emotional attachment.
In this salsa track, Yiyo Sarante sings, "Yo sigo aferrado, aún está el recuerdo" (I keep clinging, the memory is still here). He uses this word to convey that he is unable to let go of his past love, desperately holding onto her memory even though it's causing him immense pain.
This song is a masterclass in heartbreak. Yiyo Sarante isn't just sad; he's completely lost after a breakup. When people ask where his partner has gone, he tells them, "Que sigue conmigo" [That she's still with me]. He's not lying, at least not to himself. For him, she's everywhere: she's the scent on his pillow, the mess in his room, and in "cada espacio / De mi corazón" [every space / of my heart]. He can't escape her memory because it's attached to everything he sees and touches.
He's also angry and confused. His whole life feels broken, and he blames his ex for it. He asks a question that anyone who's been dumped can understand: "Si me iba a dejar / ¿Por qué permitió / Que la amará de esta forma?" [If you were going to leave me / why did you let me / love you this way?]. He feels like her affection was a drug, and now he's going through a painful withdrawal. He's stuck loving someone who doesn't love him back, with a stubborn heart that refuses to move on.