You would say "Usted no es un verdadero amigo".
To say hello friend in Spanish you can say "hola amigo".
my friend = mi amigo
amigo
Amigo is one way of saying friend in Spanish. Amiga is for a girl.
"Para mi amigo/a" = For my friend
I would have to say a true friend because you can always count on them.
You can say "¿Cómo estás, amigo?"
para amigo(a) = for friend (male/female)
a mi amigo
mi amigo
el amigo/a
Amiga