Carrie Classon’s, “Blue Yarn: A Memoir,” is available at Amazon, Barnes and Noble, and other fine stores. Learn more at CarrieClasson. com. We had dinner with friends last night. There is nothing unusual about that, except these were all people I did not know; people my husband, Peter, had met while taking his daily hike in Mexico. This was not the first gathering of Peter’s friends we’ve had. My self-professed introvert of a husband has become something of a social butterfly outside of the U.S. He goes to the same botanical nature reserve to hike every day and he meets new people and forms new friendships. Peter still professes to be a shy person. He is not. But last night was particularly special because these were not visiting Americans or Canadians or even Norwegians all of whom Peter has met and introduced me to. These friends were the Mexican employees of the nature reserve. We invited them over to our hotel, which usually serves only breakfast and lunch. But our kind host,…