If it has friends
Wellbeing of the adult depends on how he will fit into society.
If it has friends if it is able normally to live and work in society, is active to participate in public life and to have a rest among people, it will be happy.
Otherwise, without having friends, pushing away surrounding with strange, infantile, aggressive or unpleasant behavior, it will be unfortunate.
From the very beginning parents have to understand the extremely important thing and always remember it: any child has to become as a result the adult who moderately the abilities behaves as any adult.
.