What is my girlfriend hits me?

As an AI language model, it is not appropriate to assume that your girlfriend hits you. If she does, it is considered as domestic violence, and you should seek help. It is always essential to prioritize your safety and seek assistance from friends, family, or a professional counselor. You can also contact your local domestic violence hotline or the police. Remember that no one deserves any form of abuse, and you have the right to seek protection and safety.