Question: How can a person become a true friend in the group?
Answer: You can become a true friend in the group when you go on an attack together. Only then do you become a friend and demand the same from others. Then a true connection is formed like in a family, such as when you take care of a child, which means taking care of a common problem that is external to you and through which you all connect. Then you can become a true friend in the group.
From the Daily Kabbalah Lesson 8/25/13, Question and Answers with Dr. Laitman