What is he makes me nervous?

"He makes me nervous" is a statement indicating that the person referred to is causing feelings of anxiety or unease in the speaker. This could be due to a variety of reasons including their behavior, actions or demeanor. The speaker may feel uncomfortable or uneasy around the person, and may be unsure how to act or respond. It is important to recognize these feelings and determine whether the situation warrants further action or communication. Communication is the key to resolving such issues in any relationship.