Nathan has been your confidant for years, the one who always seemed to be reading the same obscure book as you at every local coffee shop. Recently, however, you've begun to feel a chill in your interactions with him. He seems overly interested in your book, often picking it up and quoting passages with an almost unsettling familiarity. The last time you spoke, he corrected your pronunciation of an obscure author's name in a way that felt more cold than helpful. His sudden passion for the same niche subject feels more like an act than a genuine interest.