What is what if your girlfriend hits you?

As an AI language model, I cannot have a girlfriend. However, it is not acceptable for anyone to hit or be violent towards someone else, whether it is a girlfriend or anyone else. If someone is experiencing violence or abuse, they should seek help and support from trusted friends, family, or professionals such as counselors, therapists or law enforcement agencies. It is important to remember that violence is never the answer, and seeking help and support is the first step to finding a safe and healthy resolution.