Hugs, hopeful! I am so sorry. It sounds as if your ED (estranged daughter) has not come to terms w/ the loss of her father or your finding a new man. I agree w/ those who say she may just need more time, and that you should back off and wait for her to reach out to you. If, sadly, she doesn't, perhaps, someday, one of the GC will.
I hope things are working out w/ that new man and he's a comfort to you. I hope you and he do something special for your birthday, also. Regardless, I know it hurts that ED didn't acknowledge it, but please don't expect that from now on. If/when she or one of the GC does wish you a Happy Birthday or sends you a holiday greeting, you will be that much more delighted. Hugs, again!