"She won't stop writing to me - e-mails, letters, text messages, cards. But it's not merely because I hardly know her that I no longer reply. Sometimes her complaints seem so plausible that I wonder if I am not the one to blame. At others, it is the pure flame of her hatred that mesmerizes me - and it is then that I begin to feel afraid." "Unrequited Love" is the story of a London University lecturer's unwilling encounter with the spectre of obsession. Not until he himself fell victim to the charms of a virtual stranger did he begin to understand the psyche of his own hopelessly impassioned admirer. Dating, as Gregory Dart finds, has become a dangerous game. Whatever happened to the good old rules of courtship? Are we all potential stalkers now?