What is what does just friends mean to a guy?

As an AI language model, I don't have personal experience or emotions. However, based on general observations, just friends to a guy typically means that he enjoys the person's company, shares common interests, and values their friendship without any romantic or sexual interest. For guys, having a female friend they can hang out with, talk to, and enjoy activities together, is often seen as valuable and meaningful. It also means that they respect boundaries and are not expecting or hoping for any more than friendship. However, it's important to note that the definition of "just friends" can vary from person to person and context to context.