SQL tables for a chat app

Question

I'm new in this field, and do not know witch methode is the best for implementing the tables. I have a table with users and passwords and I need a table to save everyone's friends. So... my question is... I need to creeate one table for every user to save his friends? There are too many tables at a certain time.

I need a table with online users... or i need to creeate a view with that?

thanks