You're not easy to love.
You are so much. If you say "Tu eres tonto", it would be "you are dumb or foolish."
"¿Cómo estás de dónde eres (tú)?" This means "How are you, where are you from?"
Eres hijo único means: You are an only child. Tienes hermanos means: You have siblings.
You are what you say (you are).
This is in Spanish and the translation is or if you are young
If they say in a way of a sentence, it would be; "You are a doctor" If is a Question; "Are you a doctor?"
You are the ideal (perfect) girl for me.
A proximate interpretation would be, "You're a real [female] 'flake'."
You can say "Eres serio". Or "eres seria" if 'you' is a female.
you know your really pretty girl
Translaton: Eres lo que te digo que eres.
That is English.. slang I guess. Another way of saying it in english, are you still his/her boyfriend/girlfriend? "todavia eres su novio(a)?"