They know each other pretty well. They are able to communicate with congruence. There are few misunderstandings. There are no masks, roles or games associated with true friendship. Openness and honesty are key concepts in a growing friendship.
Friends are free to be themselves.
Friends are friends no matter what. Friendship is a result of the interaction of these eight factors in an ongoing relationship. Close or intimate friendship leads into a special relationship usually called love. This type of love is a blend of the basic friendship and two additional clusters of factors. These clusters are passion and caring.