I read in another forum that you had PCOS. Now, I am wondering if your weight issues and diabetes are due to that. Is this condition being treated?

Have you tried a weight loss program that focuses on life style and diet changes rather than short term solutions like fad diets and "restricting and purging"? (This will only cause the weight to accumulate even more.) You should ask your doctor about this. Perhaps this may be an alternate treatment to metformin in the future.

Keep trying. Oh, and congratulations on the weight loss!