I believe it is all an inside job , the eating disorder is a symptom , There are many great books on well- being and self -help .
There is a book that may be helpful called
women , love , and addiction
also another called
you can heal your life
If the disorder is serious it would be a good idea to seek help , to talk to a therapist , doctor and nutritionist .
It is also a good idea to get a good support system, seek a a support group , and confide in a friend / family member who will keep you accountable .