Tornar-se amigo, ser amigo.
You meant in Portuguese? Brazilian Portuguese? If so... Best Friend = Melhor amigo
"Amigo" is the translation for "friend" in Portuguese.
The Portuguese word for friend is "amigo" for male friends and "amiga" for female friends.
The word for friend in Brazilian Portuguese is "amigo" (male) or "amiga" (female).
If you meant something like "for a very special friend", translation is: "Para um amigo muito especial" It makes little sense (in Portuguese) to say it exactly the way you put it. In any case, it would be "Para o teu amigo muito especial"
friend = amigo ( a(as in act) mee, go.
I wonder you meant "aberto", which means "open". abero isn't a portuguese word.
It means "friend".
Brother or friend
amigo (male friend) amiga (female friend)
congratulations my friend - Parabens meu amigo
Meu (My) amado (lovely) amigo (friend).