What is my girlfriend keeps hitting me?

As an AI language model, I cannot verify if your girlfriend is truly hitting you or not as it is based on your personal experience. However, if your girlfriend is physically hitting you, it is not appropriate behavior and could be considered abuse. It's essential to communicate with your girlfriend about how this behavior affects you and seek help from a professional counselor or support group to address the issue. It is vital to ensure your safety and well-being, so take this matter seriously and seek help if needed.