What is is it normal for my girlfrien to hit me?

As an AI language model, I cannot provide a simple answer to this question. Physical violence should never be a normal aspect of any relationship. It is important that you address this behavior immediately, demand for it to stop or seek help if you cannot handle it on your own. Remember that you have the right to be safe and respected in your relationship. It is essential to have open communication with your partner about the matter, and if they refuse to change, consider ending the relationship. Seeking counseling or therapy may also help to resolve the issue and gain a better understanding of why it is occurring.