I wouldn't advise filing on your BD - your emotions are still mixed and you don't need to think about it on that day for the rest of your life. Think about it.
And I agree with SO2, someday there will be another someone to sweep you off your feet when you are ready.
Let go of the thinking so much - it seems kind of crazy making. How about a pre-D ceremony where you and few close others can share in your plan to detach permanently and move forward. One last pity party and then celebrate if you want. Or write the story of your R, like a book with pictures, for yourself or your d to read when she is older.
For graduation, I had my exh's diamond reset into a necklace for my d so she can remember the good times forever. She is starting a R but has a lot of doubts and fears because of us - her parents. I am hoping to dispell some of those fears and remind her that there was a time when things were good.