If you are nervous about a person, your dog KNOWS it. You cannot hide any emotion from your dog.
If your dog is shy when meeting new people, follow these rules. If it is someone you know to be safe, be sure you convey this to your dog upon him meeting them. Please make sure strangers respect his shyness and don’t quickly reach for him or you or reach over his head. Also, ask them to give him the side of their body and no direct eye contact and let him set the pace for the greeting. Let him smell them, investigate them and approach them on his terms within his safety threshold.
We have a duty to manage the world our dogs live in!