Eat foods that have less calories. Find out how many calories you eat in a typical week. Keep track. Then reduce it by a reasonable amount (say 300-500 calories less). Then after a few weeks, your stomach will shrink to probably a more natural size and reduce your calories a bit more.
The only way to lose weight is to consume less calories than you burn. What does this mean? It means to eat a balanced, healthy diet, rich in fresh (or canned or frozen with no added sugar or fats) fruits and vegetables, only whole grains, such as brown rice, 100% whole wheat bread or 100% whole grain multigrain breads or cereals (again, with no added sugars or fats), and small amounts of lean proteins. One of the best ways to learn how to do this is to join a weight loss plan. And there is simply no better plan than Weight Watchers. I'm a member myself, and have lost more than 70 pounds. I'm never hungry, I don't have to buy special food, just ordinary food from the grocery store. There is nothing I cannot eat, as long as I work it into my plan. If you want to find out more, you can go to a meeting near you (and, by the way, right now, there is no joining fee)--to find one, and to get an idea of what we are like, go to www.weightwatchers.com --what have you got to lose, except for some unwanted fat? Oh, and I'm not an employee of Weight Watchers, and I'm not paid to endorse the plan. I just love it that much!