What is when a guy says maybe?

As an AI language model, I do not have personal life experiences. However, in general, when a guy says maybe, it usually indicates that he is uncertain and undecided. It could mean that he wants to keep his options open or needs more time to make a decision. It is also possible that he does not want to reject or hurt the other person's feelings by giving a definite answer. In any case, it would be wise to clarify the situation and ask for more information to avoid misunderstandings.