RawrGirl doesn't tell anyone. She feels that if she tells people they will then look her over for fat and flaws and she would be mortified if they were like, "Yea, you do need to diet." One time she didn't want a piece of cake at work and someone smiled and said, "Oh, are you on a diet?" And RawrGirl felt like that meant she was obviously fat and needed to diet.
Of course Prince Charming knows, as weighing and measuring everything makes it pretty obvious, but as someone else here pointed out, RawrGirl doesn't feel like being the chubby girl who is always on a diet (which has basically been the truth, as she's tried to lose the same blasted 20-30 pounds for the last 14 years).
Amazingly, RawrGirl is finally near (or at) her lowest weight in 14 years, and is looking forward to seeing her family for the first time in several months come Christmas. So then it will be obvious that she had been dieting. Plus, RawrGirl will be bringing some of her own food so that she doesn't binge on all the high fat stuff because she doesn't want to reach goal just to gain it all back again.