I have been a type 2 diabetic for many years now. I went from pill to insulin back to just pills and I have found that a good diet with exercise 3 to 4 times a week is the best way to control my sugar level.
Just a note that sex don't count as exercise. Tried that it doesn't work you still need to do real workout.
The bonus in doing the exercise is that you will have more stamina for sex and most women will enjoy that.