I can completely empathise with what you're saying. I used to be a size 6-8 (which at 5'7 I can now see looked very slim/ underweight at times.) At the moment (!) I'm more like a 10-12 but I want to be really small again, I don't know, I think if you're prone to "fat days" or have a bit of a distorted body-image in general then maybe the smaller you become the less you should technically have to "worry about." (From past experience I hasten to add if you have issues like this in the 1st place it won't matter if you're a size 4 or a size 20, you'll probabaly still think certain parts of you would look better if you kept on losing weight, sorta perfectionist. You sound like you are naturally slim and petite and I am sure that you have nothing to worry about. I don't know, I'm probably being hypocritical here, as I am currently dieting/doing hrs of cardio/weights to get really slim again. I think it's just all down to you. Something I have realised is that people will fancy you regardless, I get the same amount of attention off blokes now- if not more- now I'm a bit more womanly. It's just that I know I am more confident/ can wear what I like when I'm thinner. *sighs* I hope it doesn't take over your life; in the grand scheme of things it is such a minor detail (I recognise this but don't always adhere to it myself) your personality, family, friends, all much higher up the list. And also the fact that us Westerners have it so easy anyway plays on my mind sometime, here I am trying to lose weight when some poor people have no food. Its so screwed up