I have 5 months to lose at least 50 pounds! How can I reach me goal in a healthy way?

first of all why does it have to be done in 5 months.....I am a diabetic and need to lose weight and my dr. told me to eat small meals and the stomach would start to shrink so you don't need as much to fill you up, you will feel hungry in between meals until you get used to it but hold on because it does work and stay dedicated to it. It took a while to gain the weight and it will take a while to lose it. Good luck to you. if you feel like a snack in between meals keep it healthy