How can I say I can't bear it when the coach stops doing it?

I really can't bear to part with him. He taught me a lot of theoretical knowledge. My fitness instructor is leaving, and I really don't want him to leave. Look forward to a broader stage for you in the future! You are a fitness instructor that makes me proud. You have been teaching me on the basis of my good health. You guided me on a bodybuilding road. Now you have to go. I look forward to your holding yourself in the future and caring for me forever!