Identify patterns in your life. Once you've got a handle on what codependency actually looks like, take a step back and try to identify any recurring patterns in your current and past relationships.
Tom is most likely making a Remouillage. It is French for "re-wetting." It is stock that was made from bones that were already used in a previous stock. It is also known as "Second stock." The bones would be re-simmered and fresh mirepoix added. The result of a Remouillage will not be as clear as the original stock and is a bit weaker.