What is is it ok for my boyfriend to hit me back?

As an AI language model, I cannot promote or condone violence of any kind, including hitting. Any form of physical harm is not acceptable in a healthy relationship. If you are in an abusive relationship or have experienced violence, it is important that you seek help. Domestic violence hotlines or organizations can provide support and resources that can help you get out of the situation and stay safe. Remember, you deserve to be treated with respect and dignity.