Well, about your fat theighs comment-- That is normal for many girls going through puberty. As they fill in and gain weight they tend to either gain weight around the hips and theighs OR they gain around the stomach. Gaining on the theighs is much healthier than putting fat on the stomach so you're not in bad shape. If it looks like your friends still have really skinny legs, that just means they are hitting puberty later than you. They will catch up. As for how many calories you should have--i'm not going to be the judge of that. You can talk to your parents about what they want you to eat and what you want you to eat, but they will usually do what is right for you.