"You are my life.":
informal to one person: "Du bist mein Leben."
informal to more than one person: "Ihr seid mein Leben."
formal in both cases: "Sie sind mein Leben."
My life in German is mein Leben
Long life = langes Leben
happy married life = glückliches Eheleben
Life is love translates to Leben ist Liebe.
Das Leben ist bedeutungslos. (literally life is meaningless)
That would be Sie haben kein Leben.
Licht, mein Leben
Leben ist Liebe.
Sparen (as in to save money) Retten (as in to save a life)
Du bist das Licht meines Lebens is the translation in German. It is translated from English to German. German is mostly spoken in the European countries.
"Das Leben wartet nicht" is the expression that you are looking for.
(ein) gutes Leben, e.g. wir haben ein gutes Leben - we have a good life