When you have a friend you should communicate with them as often as possible in a face to face situation.
Now I have a friend who lives in North Carolina..
And I live in New York..
So it's not often that we get the chance to see each other face to face.. but when we do.. Trust me we are definitely chatting it up.
In our modern society it becomes too easy to just text or make a quick phone call all the time.. and never really spend one on one time with that friend.
The biggest thing in any friendship is COMMUNICATION..
You must communicate with them!