How to Accept Not Getting Your Desired Role in a Play

I got an ensemble role in "Elf" and I am super disappointed. I really thought my audition went well! I'm in middle school, and some of the kids in my theater group are high schoolers. What can I do? I would just say keep at it! Don't give up. Those high school kids may be good, but they have to graduate someday. So when they do, you'll be at the top! Don't give up, don't quit. The more you practice and stay at it, the better you'll get. Also, don't remember to have fun. Try not to decide what role you want. When you audition, don't think about competition between people for that role. Maybe even ask those high schoolers for help. Think of the positives of your role. If you can't think of any, at least try to have fun. Do your best so that you impress the director and can hopefully get a bigger role next time.