Last day was talking a friend ( he is am immigrant from Iran ) about howz his friends etc. From him i got this complexity theory
In the place we have friends whom we have a lot to talk in common. Once we immigrate or go away from them , for first years we will dial back a lot talk to them etc. Later the frequency of communication goes less , and less and less. This time you will be building your roots ( a circle of complexities ) here and your friends will building there own roots. After some time you guys may find that there is less/ Nothing to talk because your complexities are different from your friends.
Once again :- what you share common with a friend who studied in school where you were very close with him/her and how much time you can talk now and what subjects ?