"Estaba Aquí Pensando" (I Was Here Thinking) is a sweet, slow-burning daydream. The singer is alone, lost in thought about someone, "imaginando tu aroma, besándote la boca" (imagining your scent, kissing your mouth). That opening line, "Estaba aquí pensando", comes back again and again, and it is a great one to learn: estaba pensando is the past continuous, the Spanish way to say "I was thinking".
The verse gets bolder. He wants to "hacerte mi mujer" (make you my woman) and asks for "un día más, tenerte, bebé" (one more day to have you, baby), before turning openly romantic and a little steamy about wanting her in his bed. Then the chorus brings it back to shy longing: "Soñé con tu sonrisa, soñé con tu mirada" (I dreamed of your smile, I dreamed of the way you look at me), "queriendo tu atención para poder hablar" (wanting your attention so we could talk). It is a simple, repetitive love song, which makes it easy to sing along with.