How is Jonas coming to feel alienated from his family and friends?

Much of Jonas's alienation comes in ch 12 and 13 from his increasing loneliness as the new Receiver. Not only does he feel increasingly alienated from his oblivious family and friends, but he grows increasingly isolated. Jonas’s emotionally maturing exponentially. His memories and emotions are often difficult to handle. At the same time, his family and friends remain very emotionally childish.