I understand you are becoming fat and round in your face, and are concerned about your aging looks.
Probably, your rounded face is because you have put on some weight recently. There is no better way in the world to lose weight than by diet and exercise. In fact, there is no other way to lose weight than this, and all other procedures advertised in the market are useless, if they don't take use of this. Also, alcohol and smoking contribute to a bigger face, and signs of aging. So, if you cut down on these addictions, and lose some weight, you should be able to control your problem. In case the situation is really unpleasant, and you are unhappy, you can do a simple surgery, where the excess amount of fat from your lower cheeks, which is known as buccal fat can be removed. The procedure is under local anaesthesia, and you can go home immediately after the operation. This will reduce your plumpish looks, and make you feel better.