I don't have bulemia, but I did/do have a serious medical condition that caused me bouts of severe abdominal pain and vomiting on a regular basis. I had to see a psychologist for my doctors to be sure it wasn't purely psychological. It turns out it wasn't, and a serious surgery with three months without food later I was... more or less a different person, actually.
But I digress, it's true, a lot of people don't understand the flood of endorphin and other chemicals that can create a kind of habit within the brain, very much in the same vein as drugs. Because there is that feeling right after you puke where you feel light-headed and better and that bit of relief is sweeter still for the cloud of gloom food placed over you previously. However, I can tell you from experience, what's better still? Breaking that cycle. It took me some serious medical attention, and I didn't have much of a choice in my experience, because my body literally couldn't not puke, but once I cleaned my system and my brain of a lot of the chemicals and habit and a few bits of my internal organs, I found that food was, strangely, no longer the enemy and torment that it had been. And that it could be good. Not just tolerable, but a simple and unique pleasure to be enjoyed. The whole process of it. Being full, normally full, rather than the processed food binges of yesteryear. That was really the key. Changing my diet when I changed my life, to things that wouldn't cause me to eat more than I needed or linger in my system like a dark cloud.
Sorry, I'm rambling a bit, but essentially what I want to say is... Treatment doesn't have to mean just some kind of choice or effort of will or giving up of something that makes you feel better, and more yourself. It means finding something else to do it better, and setting yourself up to choose the healthier option naturally.