@Wastinglight First, let me tell you that I think you are really owning your own issues and trying to deal with them. That's brave and rare. I've seen that in post after post of yours, which all show how much you care for him and how honest you're trying to be with yourself as you work through things. I think you're a wonderful person, so don't beat up on yourself for not being perfect, because no one is. :)
Here is just my personal feeling about the issue of privacy, as someone who doesn't have ptsd but has always had a very strong need for personal privacy in every aspect of my life. I'm hoping it can give you some perspective. I would feel very uncomfortable with my significant other searching for my old dating profiles and other info about me online and questioning me about them. It would probably make me over-cautious with leaving my computer open too. It's not that I'd have anything to "hide," but just the feeling I'd have that I was being disrespected, watched, put under a microscope. It would make me feel almost paralyzed and very uncomfortable, afraid that everything I was doing and saying, no matter how innocuous, was being weighed and judged and counted against me. I don't work well or live well when I feel I'm being watched and judged. The quotes about privacy and "secrecy" you shared in your original post rang absolutely true for me. It's about feeling free, to relax and live within the space of my own thoughts, without worrying about someone--even someone I love--observing my every mental movement. I hope that makes some sense!
It's possible your guy is someone like me, who just craves a sense of privacy and freedom in his thoughts the way I do, or maybe it also has to do with his ptsd, only he can tell you that. It's hard for me to understand not having a strong sense of privacy, but I know that many people don't need it the way I do. While I respect the difference, I do insist on privacy from all my loved ones, and am adamant about giving them privacy in return. I don't enter my young daughter's room without knocking, or read her computer or diaries, and I've told her I won't unless I think she's in some true physical danger I need to know about. What
@WildMermaid wrote above is absolutely beautiful and makes perfect sense to me.
He said he's happy to keep working on it, and has been very loving and affectionate.
That to me is the key for you going forward. What's done is done, and he's still with you. He obviously is happy. Focus on that.
If I were you, I'd let it lie for a few days, then find a quiet moment when he's not stressed to ask if you can talk about it with him. Then share with him what you have with us, how bad you feel, how you know you have trust issues that have influenced your behavior with him, how you're putting serious effort into working on them, and how appreciative you are that he's trying to understand. You've expressed your struggles very eloquently here: Share those thoughts with him, then put every effort you can into not allowing yourself to go to that place again, and definitely make that part of your own ongoing therapy work. Don't let your internal fears and past experiences create the very situation you fear. My experience has always been that when you give most people the gift of trust and let them know it, they want to live up to it. You're a beautiful person--try to also give yourself the gift of freedom from fear by allowing yourself to trust him. From all you've said, I know that might be hard, but you've earned the right to gift yourself with that kind of peace of mind.
Hugs and blessings!