Quote from a retired Disney princess, who was one of the first Snow Whites. When you are hugging a child, always be the last one to go. You never know how long they need it. Sometimes even us 'big kids' need those hugs , too.
I am not an introvert but I love and respect a great many people who are. I wish more people would understand what it means to be an introvert - maybe you are and you don't even realise. Introversion does not equal shyness.