I hope your friend's son soon adapts to his new surroundings and feels more comfortable.
I think that there may be a good result if he was introduced to the right social circles - Maybe he'd hit it off with a new friend whom he can identify with and open up.
On the other hand, I think a bad experience may have a negative effect, so hopefully his initial socializing would be supervised to some extent.
These are just my thoughts on the matter.
