At sixteen I was diagnosed with severe anorexia. I was 5'4'' and 87lbs. I had dropped from 135lbs to 87lbs in one winter (from November to January) I lost so much weight that I had no period and I was starting to grow a fine dark colored fuzz all over my body. All I wanted was to be thin, and I took it to the extreme. I understand that you want to be thin, believe me! But I'm 20 now and have recovered from my eating issues. I am trying to put on weight because I am still not at a healthy weight. I am 109lbs. and still 5'4'', I want to gain weight because I look like a skeleton with skin. I eat 8,000 calories a day, but because of what I have done to my body in the past I just can't gain weight. You are at a completely healthy weight, and I would love to get to 118 lbs. At sixteen some girls still have the "baby fat" around their belly... if that is what you're concerned about, do ab workouts to burn it off... eating healthy is great! But just be careful. If you want to lose weight, don't lose more than 3 or 5 lbs. You are going to look ill. I know that some of your friends might be smaller than you, perhaps they have a more petite frame than you, everybody has a slightly different build, someone 5'3'' that weighs 118lbs will look heavier than someone 5'5'' just because of the height. So quit worrying about how you look, if you were morbidly obese or something I would worry, but you are TOTALLY FINE!