Perderte means "lose you." While perder (to lose) is a common verb, its use here in the infinitive form with the attached pronoun te (you) makes it particularly poignant and central to the song's emotional core.
In "Te Amo," the singer repeatedly expresses the fear of losing their beloved, stating, "No quiero perderte, sería mi muerte al no tenerte" (I don't want to lose you, it would be my death not to have you). This word encapsulates the song's intense plea and the depth of the singer's attachment and vulnerability.
This song, "Te Amo" by Los Mier, is all about that desperate feeling when you really don't want someone to leave. The singer is practically begging, saying "Hoy, antes que te marches, Déjame decirte que, te amo" [Today, before you leave, Let me tell you that, I love you]. It's super direct and heartfelt, just wanting to make sure their feelings are known before it's too late.
You can really feel the sadness and fear of being alone in this song. Lines like "No quiero perderte, Sería mi muerte Al no tenerte" [I don't want to lose you, It would be my death Not having you] show just how much this person means to them. They keep repeating "No sé estar sin ti" [I don't know how to be without you], which really drives home the idea that this person is essential to their life. It's a powerful plea to stay, full of love and a little bit of panic!