what does the next sentence mean
"Until the day I die I'll spill my heart for you"
to be more specific I would like to know the meaning of the verb "to spill" in this context.
by the way, my native language is spanish, so I will appreciate if you can translate.

Question

Answer

In other words, he will feel a deep strong love for this person until he dies and can no longer feel anything else.

Answer

He will keep loving the person deeply.

His heart is spilling love for the person.

Answer

It's a metaphor. The heart is symbolic of love. Love is about emotions that people don't usually talk about. When we are in love, our emotions "spill out" like water from a glass. Think of it like this: "When I talk to you, everything I tell you everything I normally hide from others and sometimes can't control it"

Another idea is that love is a container, like a cup. That's why in English we can say, "I am in love"