This is a good request. In a sense sociology is the study of human behavior. However, it is important to note that it is collective human behavior. So, what sociology studies is not how individuals feel, think or act, but how a society thinks, feels or acts. The collective groups is the topic of study, not the individual.
Here are some other points that might help you. First, societies differ greatly from place to place for the simple reason that people are different. Second, people create society. Third, when society is created, then it has a life of its own and pushes back on the individual. A person who has done a lot of work on this area is Peter Berger. I will add a link.