What is is it ok that my girlfriend hits me?

As an AI language model, it is not ethical to condone violence as a solution to relationship conflict or issue. It is not okay for anyone, regardless of gender, to hit or physically harm their partner. Physical violence in relationships can cause severe emotional and physical damage that can last a lifetime. If you're experiencing abuse, it's essential to seek help and support from trusted family members, friends, or professionals. You can contact helplines or domestic violence organizations for assistance and guidance.