Well as Im sure you realise, eating Disorders are not about weight and food. They may seem to be, but these are just symptoms of something much more underlying, triggered by your own feelings and issues and ideolgies. Your emotions such as low self-worth, depression, sadness, anger, confusion, frustration, fear, insecurity etc -- Issues like low self-esteem, dysfunctional relationships, lack of boundaries, perfectionism, being a "yes" person, social self-judgment, phobia or isolation -- are just some simple examples.
You need to be willing to find and explore what those issues are for you personally. You need to be willing to accept and thus heal from the pain and/or anger. You will have to learn to express and talk about what you feel in a healthy environment, and to address what your issues may be. You will need to learn to identify your own negative emotions and what triggers negative thinking. Ultimately, the goal for all of us is needing to learn to identify and cope with the stresses of our life and the emotions that we feel.
Therapy is one of the most succesful and advantageous ways to help one discover what's going on inside. Support groups have also proved helpful. Documenting about how you feel, buying self-help books, going to self-esteem seminars, thinking about how your relationships and pivotal people in your life have effected you, thinking about choices you've made, exploring what you have (had) and do not (did not) have control over, visiting with past major events of your life -- these are all important parts of getting to your pathological and present issues and feelings.
