pat, I had a friend who was the same, she would be in her 80s if she were still alive. Her mother and sister were very large ladies and I think she was frightened of going the same way. She kept up the binge eating, excessive exercise and vomiting right up until she was in her 60s when she was diagnosed with breast cancer. She could go for days without eating, then she'd binge.
That switched her focus from her weight and she admitted to me that she felt stupid and regretted what she had put her body through. She was a lovely, caring lady and my wife and I still miss her.