I have been in the mental health system myself since age 23. So much has changed with medications and other therapies, but one thing hasnt changed. There is no way to prove a diagnosis...no blood test, no brain scan that proves any diagnosis. From ADHD to bipolar everything is just guess and ten professionals may see ten different problems.
That makes treating mental illness hard. They dont really know for sure if theyare treating the right thing.
I know I have a mood disorder. I feel it when I am off my medications, which i choose not to be anymore. I was diagnosed manic depression, bipolar 2, unipolar depression and mood disorder not otherwise specified. Mood stabilizers made me a zombie. I wouldnt take anything that did that to me. Antidrpressants and anxiety medications saved my life... literally. So do I have bipolar? Nobody knows. But medications are an important part of treatment if there is a chemical imbalance that causes wayward moods or psychosis, especially delusions and psychosis.
The point of this is your son may have been wrongly diagnosed. It happens a lot.i was in hospitals three times and very often the problems are more than one. Your sons psyhosis is not particularly consistent with a mood disorder alone. It is true that mania can cause psychosis, but the person is rational once they "come down." Your son would need a long stint of compliance with treatment and trial and error to get maximum help. And he would probably need medication. With the stalking and belief a girl he never met is in love with him, his delusions seem beyond bipolar. Bipolar is diagnosed for almost everything, but its not always right.
Your poor son is s mess. If he will not or can not comply with treatment, there is nothing you can do for him and it can make YOU sick. That helps nobody.
I know from being an advocate for the mentally ill that there are group homes out there, some paid by Medicaid. I do think the client needs to agree to go and there are rules. But this may be worth looking into.
I think contacting NAMI is also a good idea. Are street drugs involved? Meth can cause psychosis. Even pot can in certain people. He needs to be sober for treatment to work.
If son wont comply, it is reasonable to have him leave.