Learning the language is one thing, but using it in the proper context is another.  Will someone please tell me what common expressions are used when two people, who know each other, meet on the street. What is the equvalent of "Hey, what's happening!?" or "Hey, buddy, good to see you again."?
Can someone also tell me a common greeting used by people much closer to each other, like a husband to a wife or brother/sister to a sibling, when they meet in someplace public like a mall or restaurant after a short separation, and are glad to see each other.  Or, for example, when a husband returns from a trip and sees his wife for the first time.  Something intimate and personal, ....?