Am I fat I wieght 145, i am 5' 5", 15 years old I was just curiouse cause my friend weights 105 & same hieght?

145 at 5'5" might be just a little chubby, not fat though. Would be a good idea to be careful and maybe exercise some to keep in shape, easier to stay that way than lose it later. You are 15 and a strict diet is not really a good idea. Remember you have curves and deposits of fat places that boys don't and you are supposed to have them. It's what makes girls look good. , round , hips. Without them we would be shaped just like the boys