Encrypted love poem

Love poem "The mirror", encrypted Vigenère cipher for spy girl. Find the key of my poem, it will tell you much! Be curious, search on internet and you will find easily the way to beak this old cipher method. I locked this translation in the fortress of If Castle (Frioul Islands near Marseille), with Edmond Dantès!

The encryption systems are numerous, isn't the love language an encrypted language for the rest of the world? The lovers know the language of the other, so no matter whether she is Cheyenne, Zulu or French, her look, her movements, her silences, her gait and her smell are her language, and it is love Which gives the other the key to decipherment.