David, my hubby was diagnosed last year with diabetes and his doctor told him it was due from being overweight. Lets just say he weighed more than you. He was put on medication to control it.
The doctor said that even loosing 20 pounds would make a difference. Well he has lost 30 pounds and for the last 6 months has not had to take any medication. He would take his blood count everyday, but now takes it about 3-4 times a week and each time it has been between 5-7.

So good luck to you in loosing the weight, as I know it isn't easy, and lets hope the weight loss will put a control on your diabetes also.