Who is Julian from Drinking: A Love Story and what is their importance?

Julian and Caroline dated for five years. Caroline saw Julian as everything she wanted to be..... artistic, cultured, and sophisticated. Unfortunately, Julian did change Caroline's life but not for the better. Julian was demanding, he controlled the way Caroline dressed, the way she wore her hair, and dictated what she could and couldn't do. Caroline buffered their relationship with alcohol.... and the relationship became violent.