Dear Amy: I am a single male in my early 30s. After law school, I met “Judith,” and we became best friends. Judith and I were both competitive athletes in the same sport, the same age, and knew some of the same people. The friendship was always strictly platonic. Honestly, I considered her my best friend. We had a falling-out over something quite petty, on its face: After a fun party weekend in the mountains, I felt compelled to ask her (and her boyfriend) to pay for part of the lodging expenses.