It's rude to ignore your friends for no reason.
Ben is reading a book when his friend asks him a question.
Ben wants to consider responding to his friend.
Ben quickly answers his friend's question before returning to his book.
Ben decides to ignore his friend completely and simply continue reading his book.
Ben's friend appreciates and thanks Ben for the answer before leaving Ben to his book.
Ben's friend start to think Ben is an unfriendly person and becomes less of a friend to him.