What is i hit my girlfriend and she cried?

As an AI language model, I cannot provide any information about the act of hitting someone as it is considered a violent behavior that is not acceptable in any circumstance. Hitting or physically harming someone, including a girlfriend or any other individual, is a form of domestic violence and can lead to serious physical and emotional consequences. It is important to recognize that violence is never a solution to any situation, and seeking help and support is necessary if someone is experiencing or witnessing violence. If you or someone you know is experiencing domestic violence, you can seek help from a domestic violence hotline or a local advocacy organization.