How does the encounter with "the Other" shape the "self"?

All humans are social animals which means that we need others to survive. If there is only one individual in the world than this person will not be able to really understand him or herself and know about what the world is. We all have families, most of the time families shape our first memory about who we are and where we belong. We experience things about how people treat us and how we feel, after that, we would realize that what we love and what we hate about. Sometimes, traumas from others that gave us during the childhood will correspond to our “self” maybe not physically but mentally affected to our ego. Sometimes the outside world is a reflection of your inner self, when you find out one’s bad habits which maybe make you realize that you did the exact same mistake which makes you aware of your “self”, at the same time trying to change your “self”. Furthermore, “Others” also help us increase our self-recognition and confident, only if you accept the existence of “others”, for example, Death of the salesman by Arthur Miller, the main character Willy Loman run away from the truth and refused to face others opinions about himself, he thought that everyone isn't affirmative about his ability and “self” which cause him lose his mind and choose to suicide in the end. Although human lives together, but we can also be isolated if we don’t want to bond with others, however everyone need “the other”, based on Maslow’s law of human basic needs, “belonging” could provide the sense of security otherwise we feel fear and nervous about the purpose of life, after that we collapse into pieces like Willy Loman, who lose the center of his “self”.