In Spanish, you say "I love you with all my heart" as "Te quiero con todo mi corazón". While the phrase "I'm gonna die" is translated in Spanish as "Voy a morir" or "Me voy a morir".
Word-by-word translation for "I love you with all my heart":
I - yo
love - el amor
you - tú, usted
with - con
all - todo
my - mi
heart - el corazón
Word-by-word translation for "I'm gonna die":
I'm - ser, estar
gonna - va
die - morir
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