There's no way you can force or compel your child to leave an abusive relationship. That's their decision to make. No amount of persuasion can make them change their mind. However, by supporting them and providing them with resources, you're not only boosting their confidence and self-esteem, you're letting them know that no matter what happens, they can lean on someone. Slowly and steadily, once they learn to love themselves, be independent and understand their worth, they'll heal.