What is what do i do when my girlfriend hits me?

As an AI language model, I cannot give any personal advice on this matter. But as a general rule, violence or abuse of any form is unacceptable in a relationship, regardless of gender. It is important to seek help and support from family, friends, or a professional counselor to determine the best course of action. It may also be helpful to discuss the issue with your girlfriend and try to find a peaceful solution, but if the violence persists, it is important to prioritize your safety and well-being. Don't be afraid to seek help and reach out for support.