you are
"Tu eres linda" means "you are beautiful" in English.
"Tu eres mi mundo" in English means "You are my world."
It's you
"you are perfect for me and you are beautiful"
it mean "only you"
You are what you say (you are).
Tu eres muy lista in English means you're so clever.
"Tu eres el vago" in English translates to "You are lazy."
means: "that's what you are"
You are my sweet.
it means you for me
Translation: And you are single (i.e. unwed)