Chicky Don't be embarassed about gaining weight back, you are definitely not alone. I was at goal 15 years ago and back and forth many times since. I can tell you for sure, when I didn't go to meetings I gained weight. The problem is, when we get to goal we think we're invincible, we'll never gain weight again, and then start paying less and less attention to how much is in a portion. Also, if it was a "diet" when you get to goal you "go off" and then gain it back. It has to be a lifestyle change.
As for your sugar-jones, you might have to go cold-turkey for a couple days to break that circle. Those quick burning (turn right into sugar in your bloodstream) carbs make you crave more of the same, one day might even do it. If you can't do that, try eating more fruit, oranges are usually pretty sweet, canned pineapple in it's own juice, all-fruit spreads instead of jelly/jam are usually sweetened with grape juice. You might like a chocolate rice cake with strawberry all fruit spread. An old time WW snack was frozen grapes. Also, they would tell you to take a teaspoon of chocolate syrup and dip a banana in it, the key to that is measuring out the syrup, so you don't eat too much of it.
You might even find something in the organic section of your grocery that will help you.
It's been my experience, when you stay away from the sugary snacks other things start to taste better and sweeter. Best of luck and welcome, there's lots and lots of support here, you've come across a great forum.