I have a pooch in my lower belly :(?

im 15 my arms have alittle muscle. my legs are more muscular then my arms. i am 5'1/2. im d 36 i weigh 132 , I feel fat because of my pooch, i feel like i weigh to much.. how do i lose that pooch? :( does my weight have anything to do with my s? cause thats what my friends say :(