Betty,
My friend is a waiter.
He tells me loads of stories where people shout at him, treat him like dirt, abuse him, refuse to pay the bill, this all makes him really anxious and stressed out, he wants nice kind softly spoken people who are a delight to serve, it really makes his day.
I sit here wondering how many times you have made other people happy by just being your self, too many times to count i reckon, you just would never notice. Sometimes a persons vulnerability makes other people so relaxed and and much more humane. Next time you order food, think of how anxious the waiter is feeling and then smile and say how are you? He's probably hoping you're not the third customer to shout at him that day.
Jack
Jack