The author is deeply embarrassed because he was wearing the same dress he had worn to church the previous morning. He had kicked off his shoes before the fire and now had to wear his aunt’s tennis shoes. The clothes he was wearing looked weird, he had no books or homework and his backpack was gone.
The words such as ‘outcast’ and ‘geek’ show his insecurity. He even says that he just wanted to curl up and die. If this was what growing up felt like, he did not want to do so.