Sugar can be addictive. The more you eat, the more you want. You can break a sugar addiction. but, it will take time. One thing you might do is read this great Spark article on breaking a sugar addiction. it has techniques that will help. www.sparkpeople.com/resource/nutrition_art
If you do find that you snack too much on junk food, get the junk out of the house. Out of sight. Out of mind. Replace the sugary treats with fresh fruit. When you feel an urge for something sweet have a piece of fruit. the natural sweetness of the fruit will help sate any sugar craving you have. Also, the fiber in the fruit will help keep you full for longer.
Try to keep as much fruit on hand as possible. If you're hungry. have an apple. if you're still hungry, keep eating the apples until you are full. I have yet to meet the person who could binge eat apples.
And binging is a real psychological problem with no easy solution. Have you read any of the Spark articles on emotional eating ? If you feel an urge to binge on comfort food when you're stressed out, you need to find other ways to release your stress. You might not be able to get out for a walk during the day, BUT even putting on relaxing music can help. Take a walk in the morning or the evening. The fresh air will do you some good.
But, check out this Spark article. it has some good techniques to help you find ways to reduce stress that don't involve food. www.sparkpeople.com/resource/wellness_arti
Reading the various Spark resources on sugar addition and stress eating can help.
You may even try blogging. Writing out your emotions can be very cathartic. There are better ways to reduce your stress and you can break a sugar addiction. I can't tell you how bad a junk food junkie I was. But with time, I was able to reform my eating habits. It will take time, but you can do it.