Reencuentro literally translates to "reunion" or "meeting again". It's a beautiful, nostalgic word that you don't hear every day.
In this heartbreaking song, the singer uses it with a tragic twist. He sings, "Y yo me preparo para un reencuentro que sé que nunca va a pasar" (And I prepare myself for a reunion that I know will never happen), perfectly capturing the painful feeling of clinging to a hope you know is false.
This song is a masterclass in heartbreak denial. The singer knows the relationship is over, but he just can't accept it. He admits, "Aunque quiera dejar de quererte no voy a poder" (Even if I want to stop loving you, I won't be able to). He feels completely helpless, like he's trying to hold onto water with his bare hands.
My favorite part is how specific and desperate his requests get. He asks his ex to say her final "I love you" in the bathroom, just so the echo will last longer. It's such a sad, vivid image. He also wants to hide his pain, asking her to do this "pa' que todas tus amigas y mis compas no me vean llorar" (so that all your friends and my buddies don't see me cry). The song then flashes back to the moment they both realized the love was gone, when she cried because they didn't kiss anymore. He knows he's lying to himself by hoping for a reunion, but he can't stop.