What is girl calls me boo?

The term "boo" is a term of endearment that is often used in a romantic context or between close friends. If a girl calls you "boo," it could indicate that she likes you and is interested in being more than friends. However, it could also be a casual term used between friends or acquaintances. The exact meaning of the term will depend on the context and the relationship between the two people involved. It is important to communicate with the girl to understand her intentions and feelings towards you.