Hello Linda and Marg - I am another who has reconciled so please don't give up hope but, as others have said, do get on with your lives. It seems to me that many adult DC need to have time apart and distance from their parents in order to grow themselves and are oblivious to the pain which they cause.
It is very hard for us to let go of that which we gave birth to; as Pantglas said, although we want their happiness, it causes us pain that they can apparently find it without us in their lives. I think that attitudes often change with maturity and there is a very good chance that your AC will be back in your lives. Just don't put your own lives on hold in the meantime.
Again, as the very wise Pantglas has said, each estrangement is different, although reconciliation can bring its own challenges. Shortly after my reconciliation, my DH was diagnosed with terminal cancer and, as it is his birthday this weekend, DD and her DH and two DDs are coming to visit. It will be the first time she has visited this house since we moved here, over three years ago, although she does live a long way away. Her two sisters will be here, neither of whom she has seen or spoken to for a considerable period of time - in DD2's case it is four years. DD2 is incredibly anxious about the weekend and frankly so am I. I will be glad when it's over, which is sad really, as I feel I should be excited and looking forward to seeing my DGDs. However, hopefully it will all turn out ok and I am determined that DH should have a good birthday as, realistically, it may be his last.
I wonder if DD ever thinks that, or reflects upon the pain she has caused him and the time she has missed. Not that I want her to be caused pain, but I think that when people are young they believe that life is a lot longer and less fragile than it actually is. I suspect that a lot of AC estrange without thinking it through and assuming that they can just walk back into our love and our lives when they feel like it. DD seems to think that everything can be the same but, hand on heart, I am not sure that it ever can be. She has broken my trust, she has caused deep pain and fractured the family. I am afraid to love my DGDs in case they are cut off from me in the future and I am suspicious of her motives even though, objectively, she has been trying hard to rebuild the relationship with lots of messages, calls, photos etc.
I know that this reflects very badly on me, but I am finding it hard to move forward and I am currently stuck in a negative thought pattern, although I know that this is probably at least in part due to not being in a good place emotionally because of DH. I also don't like seeing DD2 anxious as she has been a wonderful daughter and support to me and, if there is an upside, that is what it is. The nights and early mornings are always worse, so I don't doubt that I will be feeling much better later and regret that this post, which was intended to be supportive and offer hope, has become rather self indulgent. I think I need to return to some form of therapy or counselling which I did find helpful.
Whatever stage we are all at on this uniquely painful 'journey' of estrangement, we need to alter our way of looking at life in order to survive. It is all too easy to be sucked down into the vortex of misery and despair, but we owe it to ourselves and to those we love to find the strength to clamber out of it. Now I just need to take my own advice! 