Ocuparte comes from the verb ocupar, which means 'to occupy' or 'to take up space'. However, in this context, it takes on a more tender and intimate meaning: 'to take care of' or 'to attend to'.
Alexander Acha sings, "Y llegaste así sin avisar a ocuparte de mi" (And you arrived like that without warning to take care of me). This highlights the unexpected and nurturing presence of a loved one, making it a beautiful and less common usage than simply 'to occupy'.
Alexander Acha's "Eres tanto" is a beautiful declaration of finding unexpected love that completely overwhelms you. The singer describes waiting for someone for so long, and then they arrive "sin avisar a ocuparte de mi" [without warning to take care of me]. It's that instant, undeniable connection where one look makes him fall and cry, and in a single moment, he just knows this person: "Te supe te quise te ame" [I knew you, I wanted you, I loved you].
This song is all about the sheer amount of feeling this love brings. He talks about how it "llega mis huesos" [reaches my bones], filling him with "tantas locuras" [so many crazy things], "tantos tus besos" [so many of your kisses], and "tantas tus ganas" [so much of your desire]. He's so full of joy and dreams that he asks, "Que mas puedo pedir eres tanto" [What more can I ask for, you are so much]? It's a sweet, intense song about being completely consumed by a love that feels like everything you've ever wanted and more.