What is do some guys hide their feelings when they like you?

As an AI language model, I don't have personal experiences or feelings. However, generally, guys may hide their feelings when they like someone because of various reasons such as fear of rejection, lack of confidence in expressing their emotions, social pressures, or previous negative experiences. They may also try to mask their feelings by acting distant, disinterested, or simply avoiding the person they like altogether. Some guys may also feel shy, awkward, or embarrassed when expressing their emotions, especially if they think they might not be reciprocated. Ultimately, it depends on the individual and the situation.