How do you say 'i love you, you mean the world to me' in Italian.?

I want to say it to someone special. I don't want translations from google or a translation site. I would like someone who is fluent in Italian, or at least a native speaker. (I'm a girl speaking to a male.)|||"Ti amo. Per me tu sei tutto"|||''Ti amo, tu per me sei il mondo''


I'm italian.|||A simple one is just "ti amo"|||Io ti amo. si intende il mondo per me.