Superficial friendships are formed and maintained because they are rewarding, and are based on the principle of exchange. Developed friendships, in contrast, are based not only on rewards but also on friends' mutual concern for each other's welfare.
During first meetings, new acquaintances usually follow the norm of self-disclosure recipcrocity-- they match each other's level of self-disclosure, revealing mor when the other person does so, and decreasing personal revelations if the other person becomes reticent (Cunninghum, 1986).
However, if one perso ignores this gradual self-disclosure process and instead reveals a great deal of personal information, there is a good change the recipient will feel threatened with this premature rush to intimacy and will evaluate the disclosure negatively (Kaplan, 1974).
Depenetration - the disengagement from an intimate relationship. When intimate relationships are in trouble, some people emotioanally withdraw by engaging in less breadth and depth in their personal revelations.