RubyRose, you are lucky to have happy memories before the trauma came. Keep those. As for the PTSD part, the happy memories are not really a part of that. They contribute mightily to the shame factor, though. I have PTSD from a live in babysitter (same sex) who sexually abused and physically tortured me. But when I was really upset, she would brush my hair, which was very long, and I am still soothed by having my hair brushed. The PTSD comes from the Hyde part, not the Jekyll. He sounded like a dream, until the part about your dog. The key is in keeping those as separate as he did. Then you remember the trauma eventually, instead of being numb, and you realise that, while you can keep them separate, he cannot. You have the right to happy memories of your wedding and your dreams. He does not. He couldn't separate the monster from the prince. Leave that shame to him, and do your best to accept the bad times and cherish the fact that, for a little while, you had a prince.
I hope this makes sense. It's so convoluted, this PTSD stuff, that it's hard to separate the shame. Please don't feel any shame. It was not your fault.