My boyfriend, age 22, told me about his diagnosis of schizophrenia and multiple personality disorder four months ago when I started asking about things that were happening to him and in our relationship. There were a couple times when he would "black out" and not remember what had happened, most often this was accompanied by muscle spasms or convulsions, his eyes rolling around, mumbling or whispering words or sentences, and becoming unresponsive for periods of 5 to 15 minutes. Once, he also said he was unable to see, that the room was dark, after such an episode. Sometimes he'll ask me if it's raining or why the girl is crying during these instances. These episodes most often happen as we are laying down to sleep, have been occurring more frequently than they were in the beginning of 2012 (to my knowledge), and are scary for both of us.
He feels like he is losing control, he is a "miserable human being", and has no hope. He uses alcohol and other substances to cope, or at least to help him with his sleeplessness. He has a full-time job and does not have problems taking care of himself, though he sometimes exhibits signs of depression - lack of appetite and lack of interest in life and activities. He feels like it is hard for him to connect with others and doesn't trust people, though he often does sweet and caring things like making me meals or taking good care of me when I'm sick. He does have hallucinations from time to time, seeing things on the ceiling or walls, though he won't describe them to me and knows they're not real (unless his is confused shortly after an episode). He feels like someone else is living in his head and he has no personality or passions of his own. He is not delusional, rather he is very grounded in reality and a very logical thinker, though this sometimes makes him seem callous when he is critiquing my actions or emotions, an act he often apologizes for after the fact, saying his is simply bitter about his own life. I am having a hard time accepting that he has schizophrenia, mostly because I simply don't want it to be the truth, but also because I'm not sure that his symptoms line up with what I've read about schizophrenia. He told me he has been dealing with this since he was six, which I happen to know is the age when he was sexually and physically abused by his mother's boyfriend, an incident he has still not shared with his family or come to terms with (in my opinion). He doesn't take any medication anymore, though he used to take Xanax and anti-depressants. I've offered to go with him or bring him to the mental health clinic at my University to seek help, advice, or a second opinion, but he does not want to, feeling that his experience with doctors and treatments in the past have been pointless.
Do his symptoms/experiences sound like that of a schizophrenic? Could his history of sexual abuse have anything to do with what his is experiencing? What can I do to help him if he doesn't want to help himself?
10 Signs You May Be in an Emotionally Abusive Relationship 
10 Warning Signs of Childhood Schizophrenia 
10 Schizophrenia Myths Busted 
7 Ways to Improve Your Mood 
I think he may have had one before, but he hasn't been getting professional help for years and refuses to now.