I'm almost 18 and for maybe the past 4-5 years my father has been getting worse and worse and I have no idea what to do other than leave when I'm able to eventually, but I don't want to leave my mother with him. Not in fear that he'd harm her, but cause he treats her horribly in every other way.  I am in no way a mental health expert, but it definitely has to be some sort of schizophrenia. On top of that, he has diagnosed anger issues that he used to take medication for. His theories have changed over the year from aliens to bugs to religion and now all he talks about is how my mother has been replaced and I might have been replaced too. His actions have ruined us financially. When this first started years ago I didn't really know how to talk to him about it so I wrote how I felt he needs to seek help and he just scoffed at it. Ever since then I just gave up on trying to convince him of anything. He's divided our family. There are a million other things I can list that he's done, but I'd be here forever. The way he acts makes me hate him, but I also love him and just wish he would act like he did before. I want to help but have no clue what to do.