The Word 'you' is not a noun; the Word you is a pronoun, a personal pronoun. The pronoun you is the second person (singular and plural) that takes the place of the noun (name) for the person spoken to. Example sentences:
- Chris, you are a good friend.
- All of you are invited to the party.
- Would you like coffee or tea?
- I will call you when it's ready.
- You'll miss me when I'm gone.
- We brought some lunch for you.
- Would you like to see the new movie?
- It's nice to see you again.
- You will all have a chance to participate.
- Finish your homework before you go out.