Mom makes me want to starve myself

Growing up my mother was morbidly obese. I got bullied for it a lot. She got weight loss surgery a few years ago but she’s back to her old eating habits and putting the weight back on. From a young age I would restrict what I would eat because of her. I wouldn’t eat certain foods that she loved because I considered them bad. By the end of high school, I was practically wasting away. She would lie to everyone and say I ate like a ‘grown man’ but my metabolism was just too fast for me to put on weight. We left my pediatrician one time during an appointment because they suggested I may have an ED and she refused to believe that. She eats constantly and she’ll talk with her mouth full and smack and it’s extremely triggering to me. It makes me not want to eat. I had to leave college because of the quarantine and it’s taking a huge toll on me being home. I’ve told her before how it bothers me but she doesn’t care. Does anyone have any advice to make this not bother me so much?