This song is all about that amazing, unexpected feeling when someone new comes into your life and completely sweeps you off your feet! The singer talks about how this special person appeared "como en cuentos de hadas" [like in fairy tales] and arrived "cuando menos lo esperaba" [when I least expected it].
You can really feel the intense longing and excitement. The singer says, "me queman las ganas de estar contigo" [I'm burning with desire to be with you], wanting to hug them and be close. It's that feeling where just looking at them isn't enough; you want to wake up next to them every morning, "verte feliz y a mi lado sonreír" [see you happy and smiling by my side].