possible Paranoid Schizophrenia

I recently broke up with my boyfriend of 2 years. The beginning of our relationship was wonderful, but as the months went by I began to notice that he would analyze and question everything. Soon after he began to question my interactions with others, and also our friends. They became so fed up with him questioning their friendship that they eventually stopped hanging out with us. We then began spending more time with acquaintances, and he would bend over backwards to help them out, and slowly spent less and less time with me. He began sleeping less and less, and he would forget to eat, often going a full day without eating or drinking anything. This past june, his parents took him to the hospital after he hadn't slept for four days. He was extremely slow to responding to questions asked him, and would often respond with a statement that had nothing to do with what was asked. The hospital decided that he should stay for further treatment, but his mother insisted that he could be treated just as well at home. When he returned home, I came over to talk to him. He told me that he saw the walls moving and that the hospital staff were really nazis out to get him. I stayed with him that night, and it took him 4 hours before he finally went to sleep. Since then he has lost his job, dropped out of school, and now spends all his time in his parents house. The only time he leaves is with his family, and I'm the only one allowed to come to his house. He is convinced that all of this is real! I know he needs help, but he refuses to go to a psychiatrist, and has always been weary of taking pills, even an advil for a headache. It's been four months since he was at the hospital, and day by day his beliefs are solidifying. I just don't know what to do! If anyone has any suggestions...please let me know. Thank you for reading this.