I [20 F] dated my ex-boyfriend [21 M] in high school. Although it is complicated to explain the dynamic of our post-breakup friendship since we share the same group of friends, we have always maintained contact with each other and have a unique kind of friendship.
We broke up a few years ago before university, and I have since moved to a different country. I always knew we had a bond and special kind of understanding for each other. We also have a habit of turning to each other for support and guidance when major life changes happen in our respective lives; whether that be good or bad.
A while ago he called me in a mad panic. He didn't sound like himself. He said a lot of things that were not adding up. I instantly knew something was wrong and reached out to our friends to ask if they had spoken to him recently. They all agreed that he did not sound like himself, but no one mentioned the specifics of what he said. I was the only person he shared his hallucinations with.
Things were getting worse every day, and I made the decision to break his trust for his wellbeing and safety. I got it touch with his family and disclosed to them what has been happening.
They went to visit him, and have been keeping me in the loop about his progress. He's currently hospitalized and has been diagnosed with schizophrenia.
I don't understand what he's going through, but I want to. I've gotten in touch with a psychologist who has explained to me how schizophrenia affects his internal battles.
His family has been keeping me in the loop about his progress - I'm guessing because they feel obligated since I was the person to bring his mental illness to light. And I have been the bridge of communication between his friends and his family.
I love him, I care about him, and I want to support him - but I'm not sure if I am overstepping, or if it's in my place to be involved in his recovery. I don't want him to feel like his privacy has been invaded, and I'm not sure how involved he wants me to be - given the strange dynamic of our friendship, and our history.
Thoughts? Advice?

tl;dr: my ex-boyfriend recently developed schizophrenia, and I'm unsure how to support him without being invasive.