DEAR ABBY: My 15-year-old son will be entering 10th grade. He has been a member of the school band since sixth grade. After performing in last year’s Christmas parade, a group of the students went to a nursing home to perform for the residents. When we arrived, I started to get out of the car with my son so I could listen, as other parents were doing. My son seemed surprised that I was going to stay and said he would rather I didn’t because I make him nervous. Needless to say, I was devastated. Now, whenever there’s a concert, festival, parade ...