“Friendships are built on respect and trust. Both elements have to be there.”
– Stieg Larsson

Karl Stig-Erland “Stieg” Larsson, better known as Stieg Larsson was a Swedish journalist. Having won many awards, he enjoyed as much popularity as distrust. He rebelled against the Swedish right wing, which in turn led to many death threats. He is best known for his novels, grouped under the Millennium series.

Relating the quote to the story

When Horace is in a very uncomfortable situation, Boris simply laughs at him. He is just not concerned about Horace. He is neither respecting nor helping Horace. So, Boris is not a true friend.