Are you exercising as well as dieting? I haven't lost as much weight as I have wanted to, but recently I have found that my clothes are literally hanging off of me. I have a belt that I had worn when I weighed 20 lbs less than I currently do, and am past the hole I used then! So I'm obviously both losing weight, but gaining muscle mass at the same time, so the scale isn't moving, as much as I think it should, but my clothes are fitting better, and that's the important thing for me anyways!