I think I have a second personality. He has a name (gonna call him 'R' for now) and he's a literal demon - horns, tail, and all. R is a sadomasochist, likely has NPD, and he absolutely hates humanity and he wants to end it. I don't have schizophrenia, I doubt I have DID, but yet R's still there. He's destroyed half of my personality so far, but I can't get rid of him because I don't think I'd survive it. I've talked to my therapist about it but he didn't take it seriously.