What do I do?

My best friend is a guy. He was raped and he's really embarrassed about it and won't tell anyone about it because it makes him feel unmanly. I think he should come out of hiding because rape isn't a thing to be ignored. He said, "You never hear about a woman raping a man. You know why? Because most men aren't pussies and I am." He was crying all over me and telling me how it's his fault and anything I said to try and make him feel not so bad about it made him cry more and he just is really shook up on it and doesn't want to report her. What am I supposed to do?