What is when a guy calls you boo?

When a guy calls you "boo," it's typically a term of endearment or affection. It can indicate that he feels close to you or cares about you. The word "boo" is often used between romantic partners, similar to terms like "babe" or "sweetheart." However, it's not exclusively used in romantic contexts; sometimes, close friends might use it to express camaraderie or simply as a friendly nickname. The exact meaning also depends on the relationship context you share with him and his usual way of expressing affection or friendship.