Translated to: "You are a lunatic."
You're a mouse
It says, "You are a bad friend."
You're a bold and fresh
Eres un mono loco.
you is an ugly donkey and you isn't a good girlfriend. Don't feel too bad about the insult though, it should read tu eres...tu no eres.
you're an ass
You are a crazy man(boy).
This means: "If you are a bird, I am one too".
"Tu estás un estrella" is grammatically incorrect in Spanish. The correct way to say "You are a star" in Spanish is "Tú eres una estrella."
Tu eres un buen estudiante.
That would translate to: tu eres un ciruela
Tú eres un super estrella means You are a superstar The statement is directed to a man or boy. Replace "un" with "una" to direct the statement to a woman or girl.