A has an acquaintance online, B. A has not known B for very long. About a week. B knows a shocking amount of in-depth information about A, and has sent A several, long paragraphs on A's personality and behaviour. The sort of information you would only know about someone having lived with them your entire life. B was nothing but kind to A and has been helping a through a personal issue. But A found it scary that B knew so much about them and has blocked them. B has contacted A on another account saying that they will always be there for A, and added that they don't know what they've done wrong and would like to know.