Based on the information given, the abnormal behaviors that Rick is engaging in include personal distress, maladaptive behavior, and deviance.
Maladaptive behavior simply means behavior that doesn't allow an individual to adapt to a particular situation or difficult circumstance.
Also, since Rick has been distressed over a long period of time. he has had problems coping with life and relating to people, he's having personal distress too. It can also be deduced that he's deviant.
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