Should I see a registered dietitian if I have diabetes?

Can be very helpful. Not only do they teach what to do [see my health files diet sheet], but they can tell you how to do it, using foods your used to eating, gain better compliance.
Yes. It is always helpful to see a dietician if you have diabetes so you can learn more about portion control to improve your weight and to learn about the "right" food to eat. A dietician can also provide you with information on carbohydrate counting which might be necessary in the treatment of diabetes.