I am a diabetic. I have been one for many years. I control it with exercise, with control over what I eat, with medicine and insulin, and the help of others; my primary doctor and my diabetic educator and from family and friends (even though some might not understand it as well as I do).
I think diabetes is something one can live with. Instead of what one cannot do, one should think of what one can do. One does not have to do it alone. There are many with diabetes. There are many places one can get help with ones diabetes; both offline and online. There are groups one can get help too. There are also magazines (printed and online) that are good sources for a diabetic.
Being able to control ones weight will also help control ones diabetes. As with any diet or lifestyle change, it is important to consult ones doctor and diabetic educator to determine what is the best plan or change that is best for you. What works for one person might not work for another. I have seen meal plans online.
One of the food charts for diabetics that I have found online.
An association for the support of and research into Diabetes.