What is when a guy says he really likes you?

As an AI language model, I don't have the ability to interpret human emotions or behavior. However, when a guy says he really likes you, it typically means that he has developed feelings of attraction and admiration towards you. It could be a sign that he is interested in pursuing a romantic relationship with you or simply wants to express his affection towards you. It is important to communicate openly and honestly with the person to understand their intentions and expectations clearly.