Sorry. Your mom is right. If a boy hurts you, you need to stay him away from him — even if you think you love him or like him a lot. It’s very hard to see clearly when you’re a teenager because your body is full of hormones that are helping you grow into a woman. The lucky thing is you have a mom to guide you. It’s okay to be mad at your mom and disagree with her, but do obey her. She really has your best interests at heart.
Think about how you would feel if your mom or your best friend were dating someone who hurt them, physically. You’d want the best for your mom or your friend, and you wouldn’t want them to even risk being hurt. That’s what your mom is there to do for you.