What is when a guy acts silly around you?

As an AI language model, I don't have personal beliefs and emotions, but I can provide some information as follows:

When a guy acts silly around you, it usually indicates that he feels comfortable and relaxed around you. He may be trying to make you laugh or take the pressure off a tense situation. Alternatively, his silly behavior could be a sign that he is trying to get your attention or show off his fun side. However, it is important to note that everyone has different communication styles, and some people may naturally act silly or playful without specific intent. It is best to gauge the situation based on your personal experience and the context of the interaction.