You are valuable and important. You are a living creation, a human being, created by God. You deserve the best in every way. The best attention, the best education, and the best care you can possibly give yourself.
Why settle for less? Do you actually believe that you're worth less? ("worthless")
When it comes to weight loss and being healthy -- give yourself the best -- show yourself how much you're worth. Feed yourself healthy food and in moderation. Don't overstuff yourself. Make sure you go outside and move your body.