What is what does b mean from a guy?

As an AI language model, I don't have personal experiences or emotions. However, "b" is a slang term used by some guys to refer to their romantic partner or their close friend. It's short for "baby" or "babe" and is often used as a term of endearment. Some guys also use "b" as a shortened version of "bro" or "brother" when addressing a male friend. It's important to note that the context and tone of the conversation can greatly affect the meaning of "b."