I don't have the answer on how to get past this one but I can empathize to a certain degree. No, I don't play an instrument but I've found myself being very embarrassed by people making a big deal out of things that I'm good at. For example, I've had several pieces of writing published. Normally a person should be happy about this and enjoy having their loved ones spread the good news. Me, I just want to hide. I can't deal with accolades or praise. I don't know if there is a name for this or if it's part of a larger problem.
All I can say is maybe ask your friends and loved ones not to make such a big deal about it. Maybe you could let them know that being called out on this causes you embarrassment and may ultimately hurt your creative process.