I would strongly recommend seeking professional help. It is important to realise that you are not alone. There are many people who have been through your situation and come out of it healthy. You don't need a miracle cure. Curing bulimia and related disorders is standard medical practice.
There are medical professionals who heal your condition as part of their day job.
The best program I know of is this one: Mental Health Services, Statewide Services - Victorian Government Health Information, Australia
They use include a large component of counselling. Perhaps there is a similar service in your area.
If you need further details please Personal Message me.
This site has some good information: beat : Welcome to FYP