Will doing this keep me from becoming a diabetic?

I jog and walk on my treadmill an hour 5 days a week. I have a lot of belly fat. I do eat healthy things but I also drink beer occasionally. Michelob Ultra Lime cactus. It's the only thing alcoholic I will drink. Most of the time it's unsweetened green tea and water. I never drink soda. Is there anything else I can do to help reduce my belly fat?