Who is Dustin Williams from Give a Boy a Gun and what is their importance?

Dustin Williams is Brendan's neighbor in Middletown. He plays on the football team, and he becomes friends with Brendan and Gary. When he realizes that all Brendan and Gary want to do is play video games, Dustin distances himself from the boys. Dustin does not bully Gary or Brendan during football practice, as his teammates do.