Remember how much your body does for you, every day. Try to focus on what your body can actually do rather than what it looks like. Perhaps your body has helped to produce another human being (how amazing is that?) or maybe it's done magical things like help you run marathons or climb mountains. It's quite possible it simply keeps you alive and allows you to just be, and that's fine, too. Write a thank you note to your body; it deserves it.