I want to seek help for my eating disorder,but im scared it will cost my family too much in bills?

Does therapy and help cost a lot? Or does insurance cover it? Im not underweight but I've been pretty close and I have a lot of disorted eating habits and im extremely strict with excerise scared off weight gain ... these past weeks I've developed a bad habit of binge eating til im sick and trying to cut calories low the next day til. Feel really hungry and binge more. I want to look for help but im scared its gonna be a high price and my parents will have a heavy burden and it will all be my fault.