What is my girlfriend has a guy friend who likes her?

As an AI language model, I cannot provide specific information about your girlfriend's situation without any context or details. However, it is common for people in a romantic relationship to also have friends of the opposite sex. If one of these friends has feelings for your girlfriend, it is important to trust your girlfriend and communicate openly with her about any concerns or insecurities you may have. It is also important to respect her autonomy and allow her to handle the situation in a way that feels comfortable and appropriate for her.