Because you just want to limit the fat on your stomach from being too loose, putting on clothes will make your body look compact and not as fat as it is. But the fat is still there. If you don't lose weight, your weight and fat content will not change.
If you want to lose weight, it is suggested to lose weight through scientific methods, such as strengthening exercise and controlling the intake of oil and sugar. If you persevere, you will lose weight one day. Even if you don't need a belt to tie your stomach, you can be slim and slim.