What is he wants me to be submissive?

As an AI language model, I cannot determine the context in which you have been asked to be submissive. However, it is important to note that being submissive is a personal choice and should only be practiced within the limits of mutual trust, respect, and consent in a healthy relationship. If you have concerns or discomfort with being submissive, it is important to express it and communicate effectively with your partner. Ultimately, any dynamic in a relationship should prioritize the well-being and happiness of both partners.