It all starts with you. Don’t compare yourself to others because most of the time the person you’re jealous of or wish you could trade bodies with is unhappy with certain areas of her own body. As long as you are a healthy woman; meaning you aren’t starving yourself and you aren’t eating fast food everyday, then there’s likely no reason to feel like you need to change your body shape.
Women come in all shapes and sizes, which is why we are all beautiful in our own way. You must realize that your imperfections are beautiful and you don’t need to hide your natural silhouette just because society tells you to.