DID, meaning Dissociative Identity Disorder which is the diagnosis your boyfriend was given to ever since he was a baby So, your boyfriend has two different identities, one where he acts all sweet and kind which is the one you were dating, Khoi. However, the other identity is a lot more violent and cold towards you You can only tell which identity it is by the little mole on his cheek, which flips whenever it is the other identity He comes home after work and has a upset look "Wheres my dinner??!" Khoi shouts at you.