What is confident guy nervous around me?

As an AI language model, I do not have access to specific information about a particular person's behavior and emotions. However, in general, a confident guy who becomes nervous around someone might have feelings of attraction or interest towards that person. It is also possible that the person is intimidated or overwhelmed by the person's presence or personality. In either case, it is essential to communicate clearly and openly with the person to understand their thoughts and feelings better and address any concerns or confusion.