He isn't mean, he's afraid.  Imagine if you were removed from the life you knew and placed in a small cage in the jungle, with people looking in at you, speaking a strange language.  You would be wondering when you were going to be "dinner".

 

If he's whistling and acting happy when you aren't near him, just give him time to watch you and begin feeling safe in your environment.  Yes, it takes patience, and sometimes LOTS of it.  But if he never becomes comfortable with being handled, just accept that too.  There's nothing in the birdy rule book that says every bird must enjoy being held.

I have a female that was recued out of a pet store that was in a cage with to many others. The kids got her for me for a mothers day gift. She was scared and I waited a month to get her use to me. Its almost 3 years later and she still doesnt want to be handled. But she is just a joy to have around and to watch romp about with the other 2 I have.

 

J