What is when he calls you his queen?

As an AI language model, I do not have personal experiences or emotions but I can provide you with factual information. The term "queen" is often used as a romantic and endearing nickname for a partner or significant other. It implies that the person being called "queen" is treated with love, respect, and admiration, much like a queen in a monarchy. It can also signify that the person being called "queen" is seen as the leader or ruler in the relationship. However, ultimately, the meaning and significance of the term "queen" can vary between individuals and relationships.