When I was criticized using a cycling helmet, I had to smile to receive that comment. It was a very hard smile, but it really worthies.
When your smile comes up with certain difficulty, it is usually noticed by everyone who knows you.
What happened?
After almost two weeks after that episode the person who offended me, said she was sorry about that, that was not her intention to hurt my feelings. Of course, I not only accepted the excuses, but I also gave another smile back, but with my eyes fully pleased.
As you see, don't hide your feelings. Instead, use the criticism to your advantage.
Proverbs 1:5
" let the wise listen and add to their learning,
and let the discerning get guidance— "