You are never too good to take class with someone younger or less skilled than you. And you will become stronger by continually revisiting the basic foundation of your training. Infuse even your routine classroom exercises with passion!Keep an open mind and a positive attitude. Do class by yourself and you will see how great is the feeling after.
No matter what you do, there will always be someone who thinks differently. So concentrate on doing what you know in your heart is right. What others think and say about you isn’t all that important. What is important is how you feel about yourself.