He's started to get comfortable telln me deep dark secrets and that's huge for him. He has a dark past.
I would agree to question the work that he has done on these secrets. My ex had them too, but the problem was he didn't do anything to work on them.
I would say that if he worked on those secrets and went through counseling or guidance, they wouldn't be so deep or dark anymore, they would just be something else in his past that he had to deal with.. If they are still deep and dark, then it sounds like he needs to get help..
Please tread carefully. You can't fix someone who doesn't want to fix himself. It sounds rather manipulating to me.. It feels good to think you are the angel that helps someone deal with their deep dark past, but that's not how they heal. They heal by working on it themselves and reaching out for help, not just admitting to you that it's there..