Nunca en tu vida, déjame.
No quiero que nunca me dejes
There are several ways to tell someone to leave in Spanish. One can say dejar. Another way is to say salir. Yet a third way is to say abandonar.
La vida is the life in spanish.
licencia entoces
Voy a irme
'La vida contigo' is the Spanish equivalent of "Life with you".
Lleno de vida is the best way to say "full of life" in Spanish.
nunca
Alístate para ir.
nunca me dejes
No salgas -or- no te vayas
I would just leave it as "Dexter".