How long did the narrator and Eleonora know each other before they fell in love?

The narrator and Elenora knew each other since childhood because they were cousins only.

Explanation:

Eleonora is a short story which has been written by Edgar Allen Poe which was published in the year 1842. It is a story of an unnamed narrator who lives with his cousin and his aunt in "The Valley of the Many-Colored Grass". It is a story of how the protagonist of the story fell in love with his own younger cousin.

This story is some what considered to be an auto biographical only. This is a romantic story which has a happy ending.