Thank you everyone for your thoughts and feelings.
Indeed, I am experiencing this as a parent of a child who has decided to transition. Since I had never known Oana as anyone other than Oana until last week, it is exactly that.
I think the option of bringing Oana, now Stefan, to the US is a moment that has already been missed. After we signed the lease for his apartment yesterday, I think Stefan has made his choice to stay in Bucharest and walk his new path as a man. With the help of a friend and with help from me, he has moved almost everything that was his and Oana's to his new apartment. My own home now has a very empty feel even as each and every wall rebounds with memories.
This all "seems" much easier for Stefan than it does for me. He is "certain" of what he is doing and has already pushed his personality to a male extreme that contrasts with the soft person I knew only weeks ago. I've been reasonably good but not perfect about staying in my head and supportive in his presence. When he is safely out of my sight and hearing, I break down in tears over what feels like a very real loss, a death.
I use quotations in the last paragraph because who knows? I turned back from transition in 1976, 1990, and again in 2000 before walking the path fully these past three years. Each of those previous times I would have sworn that all transgender parts of me were gone. I expect Stefan will feel the feelings again -- Oana told me she remembered them back to age 4 -- but it's not going to happen while I'm still in Romania. It could be years from now. Or perhaps Stefan is right and he will be fine. I can't project my own past on him.
The worst for me is the grieving. It's not anything that any "normal" person can understand. If there is something for me to learn, it's how my sisters felt having to watch their brother die before they could love another sister. Just how long will it take for the grief to pass?
PS to learningtolove -- You are right, and I am trying.