What is when a guy says he had fun with you?

When a guy says he had fun with you, it generally means that he enjoyed spending time with you and appreciated the experience. It can be a positive indicator of his interest in continuing to spend time together in the future. However, it is important not to read too much into this statement, as it is often casual and not necessarily a declaration of romantic interest. Ultimately, it is best to communicate directly with the person to understand their intentions and feelings towards you.