help

Hi I need help. Like seriously. I’m a 18 year old teenage girl, 5”5, and 270 pounds. I’ve struggled with weight gain since i was 7 years old. I’ve always had an issue with food. I’ve been slowly gaining weight and it’s gotten to this point. I genuinely don’t know what to do. I’ve tried to start many things. Calorie defecit, trying to exercise more, and trying to starve myself. But never last more than a day and it always ends with me finishing a family size bag of chips. I don’t know what to do. Going to doctors won’t help. I feel like part of why I’ve never lost the weight is because I’ve never been bullied or fat shamed. I’ve always had good friends and been friends with everyone else at school. So because I was never made fun of it I’ve always just brushed it aside. I need help on how to loose this. I know I won’t loose weight over night, but I need to start. I want to be 130 pounds. I want to feel pretty and wear cute things. Please help me