Is there a certain poem or biblepassage, common at Creple weddings, that contain the phrase-you are the breath of my life. Please explain.

When you say Creole weddings, do you mean Haitian weddings?
 Nope, we do not have any traditional bible verse or poem that includes this passage in the Christian arena. There are a couple of traditional hymns that we do sing at Christian weddings, especially #312 of the Haitian Chants D'Esperance. These days most Haitian weddings are westernized, but you can still see traditional Haitian weddings in the countryside.
Haitian Creole ↔ English Reference, Look up Haitian Creole and English Words