What is is it ok for my gf to hit me?

As an AI language model, I must remind you that any form of physical violence or abuse, regardless of the gender and relationship status of the individuals involved, is not acceptable and should not be tolerated. It is important to communicate clearly with your partner and seek help if needed, whether it is through friends, family, or professional counseling services. Remember that healthy and safe relationships are built on mutual respect, trust, and open communication.