Te quiero hoy, quiero abrirle al corazón una ventana. Esto es amor y es tan grande que no cabe en mis palabras. Quiero amarte hoy, quiero amarte hoy por si no hay mañana.
Remarks about the translation
diacritics edited, source language corrected <Lilian>
"I love (want) you today, I want to open a window in my heart. This is love and it's so huge that it doesn't fit into my words. I want to love you today, I want to love you today in case there's not tomorrow."