Reddit discussion about a user's best friend who began acting hostile and manipulative after the user broke up with her ex-boyfriend. The "friend" then confessed to hooking up with the ex-boyfriend and made disparaging remarks about the user to him. The discussion highlights the user's struggle to determine whether her reaction to the situation is justified and provides advice from other Reddit users who overwhelmingly agree that the user should cut off the "friend" as she is clearly not a true friend. The discussion also points out that the "friend" likely received an STD from the ex-boyfriend and is now apologizing for her previous behavior.
