Comparing yourself to anyone else doen't help at all. The sugar, and carbs and calories all went into your body; not ours. I think you need to ask yourself why you "cheated" and why you didn't use any of the tactics outlined in the Atkins book for coping with such emotions. What is your real goal; and how much do you want to achieve it?

After eight weeks your physical ravings should be either gone or considerably diminished. So you really need to look into yourself and try to ascertain just why you so willingly gobbled up all that chocolate. It certainly didn't make you feel better, did it? You are obviously contrite, and I'm sure you know that it just took you one step further away from you desire to weigh 130 lbs.

When you fall, you must get up and start again. But don't do it blindly as if just feeling bad takes care of the problem. Get in touch with yourself and ask why you slipped. And recommit to your goal. Go back to the Atkins book and read all of the relevant information on how to cope with cravings and weakness. Take some positive action. How else are you doing to reach your goal weight, and then maintain it? Atkins is easier than other diets but it still isn't "easy". It requires your total commitment.