Well done on getting those readings down, and for your weight loss. That is excellent. You have managed to get your levels down to non-diabetic levels, but will always be diabetic, so you will have to continue your good work as far as diet and exercise is concerned or you may find the levels creeping up again. As for the Metformin, if you want to come off them you need to discuss this with your doctor. The Simvastatins are for cholesterol levels, not diabetes.
Well done again!