I dont know why i'm telling you this but...
I worked with a woman in a big company, she worked hard, was very good at her work.
She accepted dating a divorced guy, this guy was like 45yo, treat her bad and his children too.
She thought that... she was very ugly, she was very fat. I think she take out the frustrations of love by eating.
After 10-15 years, I met her again. She started to do diet and exercites, took a long time but she did when there is still time. She has a very beautiful face now and very nice body. That was not easy.
If you are disguted with yourself, in terms of body, it will depend on you to work out.
My advice is try, soon as possible. I know it's hard when your mind doesnt work well. But when it's too late, you wasted the best years of your life.