su amistad significa el mundo a mi: his/her/your friendship means the word to me.
El mundo es su mundo or El mundo es tu mundo
Su / tu / vuestro mundo es éste. With different possible syntactic collocations
"You are everything to me" in Spanish is "Eres todo (or "toda" if you are speaking to a female) a mí". It is pronounced "AIR-ace TOE-doe ah me". Please see this site for confirmation of the translation: http://www.answers.com/library/Translations
El mundo frio was created in 2005.
Juguemos en el mundo was created in 1971.
Todo El Mundo was created on 2010-06-22.
El Mundo que inventamos was created in 1973.
El Mundo Gira was created on 1997-01-12.
El mundo del flamenco was created in 1971.
Dos en el mundo was created in 1966.
Celia en el mundo was created in 1934.
Celia en el mundo has 211 pages.