Hi katymac,
You might be in the right place after all! I lost 4 stone 7 years ago, and it never came back, because I eat a diet that is low in carbohydrate, so that it requires relatively little insulin - the hormone that is primarily responsible for building fat stores. The beauty of it is that I can eat as much food as I need to feel hunger free, but the weight stays off.
Take a look around the forum, because I'm not the only one who has enjoyed success at this lark.
All the best,
fergus