Graduation Drama

My graduation is approaching fast. I don't want my grandma to go to my graduation. She's not the best person in the world. She has always treated my family like shit and has always body shamed me. I have always believe in sharing life's greatest achievements with the people you love and the people who love you. My mom has told me she will not come to my graduation, if my grandma doesn't come. She also said that no one else will be there for me. Please help me!!!