Wrongful Termination?

My boyfriend and I were hired at the same restaurant, at the same time (we even interviewed together), by someone we've both known for years. She (the general manager) knew that we were together when she hired us. She also hired me with every intention of moving me up to management. That was almost four months ago. Now, all of a sudden she tells my boyfriend that he either has to quit or get fired because I've been promoted (a month ago), and company policy states that employees are not allowed to be in relationships with managers. Well, company policy states that employees cannot date employees at any level. Nor can they even live together as platonic roommates. She forced my boyfriend to quit. What can I do about it? She broke company policy, as far as I'm concerned, when she hired us knowing we are in a relationship, have been for a long time, and even live together... not either of us. Am I correct in thinking that this would be considered wrongful termination? Two former employees that worked there not too long ago were roommates (same rule broken), and neither was told they had to quit or get fired. Not to mention that our District Manager has had it out for my boyfriend from day one, because she and his mother worked together years ago, and do not like each other. It could be a huge factor. I want to sue their es. Please help me. Is there anything I can do? Who do I call?