This document summarizes 10 theories related to relationships, communication, and intimacy from chapters 10, 12, and 13 that are relevant to the narrator's friendship. The theories cover topics like self-disclosure, managing conflict, developing relationships, and the role of digital communication. For each theory, an example from the narrator's friendship with Peter is provided as evidence. The summary concludes that the narrator and Peter have maintained a strong friendship for years through open communication and mutual trust and respect.