answer:There’s only so much you can do. Back around 1958, my cousin was placed in a “home” as a young teenager because his parents couldn’t handle his mental illness. He never left the facility until he died in his 60s. In more recent decades, unless someone poses an immediate threat to themselves or others, they’re pretty much left to their own devices. Sure they’re encouraged to get medical care, attend counseling, and take medication – but so long as they’re high functioning, they can live on their own. This is an improvement in most cases as folks with mental illness are treated more humanely with more respect. Often however (assuming they’re even diagnosed properly or at all) it makes having a relationship with them challenging at best (impossible at worst). If you truly care about them, you must have a lot of patience and empathy. That being said, the relationship sometimes becomes unhealthy or toxic. You may have to walk away for a time. But then, this could happen in a relationship with a person without mental illness.