You are very old now
Tu eres muy lista in English means you're so clever.
You are very pretty
you are very brave
Tú eres muy guapoYou are very handsome
you are very big. (though it should be noted that the tú form of ser is "eres" not "es. The grammatically correct way to say that phrase is "Tú eres muy grande.")
you are pretty, I like the foto
It means, in English: "And you are a very special person"
tu eres muy erotico for male or erotica for female 'Eres muy sexi' is the literal translation of "You are so sexy". If you are trying to be a little more tactful, then you could say: "Eres tan bonísima"
"Oh daddy, you are so strict"
you know your really pretty girl
lol it means your stupid and ugly
"Y que nunca se te olvide que eres muy bonita" is Spanish for "And don't you ever forget that you are very beautiful."