Believing comes by hearing so don't be afraid to talk to yourself when the going gets tough. You're legs feel like they can't walk or run one more step tell yourself that you got this. Sometimes that little bit of audible encouragement can get you through.
Often times people spend a lifetime trying to fit into a mold that is not indicative of who they are. Embrace your differences and those things that make you unique. It really will take away some unneeded stress.
It is a struggle when we feel like we are getting no where in our weight loss journey. Find a friend online or in person that can encourage you when you are down and that you can encourage. Moral support is key to success.