Can you be detached and still.miss something? I function fine without her, but I do miss her. Us.
I think so and I think that puts you smack dab in the middle of where most normal, reasonably healthy human beings are.
Detachment as I understand isn't that you're numb. You simply have enough inner strength to not allow unhealthy attachments or emotional states to dictate your behavior and choices.
I signed papers almost a month ago and still miss the future I was working toward, still miss certain times, experiences, situations with my W. I have occasionally had similar dreams as you. They don't really affect me emotionally at this point very much though. When I think about, talk to, or see my XW in reality I see a person who's very broken and didn't treat me right and am having a much easier time separating the real XW from the one in my dreams and in the future I wanted with her.
Hang tough bro. You're a good guy and life still has a lot of good in store for you.