I don’t know what to do

I love dancing, but I quit it because I felt I got to fat for it. I’ve struggled with eating disorders for four years and it’s really hitting right now. I’m the biggest I’ve ever been (119 lbs 5’4) compared to 92 lbs only a year ago. I wanted to try dance again in school, but I have to transfer out because my hate for my body won’t let me do it. I can’t even wear athletic clothes for PE without wanted to cry putting it on. I’m certainly not underweight, possibly slightly overweight. I’ve developed purple stretch marks on my thighs and hips. I’m tired of hating myself. I look at pictures from last year (there are only a few) and I long every second to look like that again. It’s even drove me to cutting again after stopping for a few months. I really don’t know what to do anymore.