I am a male going through puberty and I (apparently) have a great voice. I do singing lessons and sing in the school choir. I know that eventually my voice will deepen, and I can sort of feel it deepening now. I really don’t want to lose my singing voice. How do I stop my voice from deepening?
You don’t stop your voice from deepening, and you don’t want to. You will not lose your singing — you will have an even more beautiful adult voice. Just work carefully with your teacher(s) and you will still be able to do everything you know how to do now; it will just be lower and richer. That will be very exciting a couple years from now! I receive many emails from young men who have gone through puberty and whose voices have not changed to lower and deepen. It is deeply painful to them, so you will probably end up being grateful that your voice is changing!