My friend was abused - help

I have just discovered that an old friend had been sexually abused when he was younger. He has only hinted at it - & said he doesn't want to talk or think about it.
But I think I knew about it back then. I didn't know what 'it' was. I had no knowledge or understanding of pedophilia then. But I knew something wasn't right.
This may sound selfish and mean (although I don't mean it that way). On this site, I have spoken to others who have suffered from this type of violence - & I would offer a comforting word, an ear to listen, etc.
But wow - this is just so different. This is a friend. This is someone I loved. This is someone I would never want to see hurt or in pain.
I feel guilt for not knowing what was happening. I feel I SHOULD have known. But I know that is not logical. I wish that I had of told an adult - that I thought something was 'odd'. But I didn't.
This old friend from 30 years ago & I, have just found each other in the past few months - via the Internet. So we haven't met in person again yet.
I know the help lines and the services that are available. I think I know the help he needs. But really. He doesn't want to talk about or remember. I am respecting this. But what do I do now? And please don't say - just be there for him.
I feel broken. I feel useless. And I feel guilty because I'm talking about me and how I feel.
I just wish - so many things.
I wish I could take it all away. Stop his pain. But I can't.