Thank you all so much for your kindness and support. I really appreciate it. Smileless, you are a truly selfless person and it is a comfort to me to have found this thread.
I also pray that when my daughter has her own child, she will realise how much I love her. Ironically, it was by trying to protect her from her boyfriend - whom I thought and still think to be controlling, that the estrangement happened - she had locked herself in the bathroom and had been sobbing for ages. Her sisters were so worried about her. I asked him to leave nicely but, when he wouldn't, I threatened to call the police and said he wasn't good enough for my daughter. Stupid I know, and I have tried to make things better, but I feel that the poison has been gradually dripped into my daughter's ear and he will never forgive me and wants revenge. But it's not only me she has semi cut off, which I would understand, but everyone else too, including her father who is blameless and her sisters, who were very close to her, as well as her friends.
Anyway, I will stop rambling. I hope all of you will also find joy. Thankfully, my other daughters have been very supportive - yesterday, as I was feeling at a very low ebb, I had an unexpected call from one of them to say that she was coming home for a few days, which lifted my spirits no end.
I do think it is important not to lose sight of what you have and not to lose the joy to be found in each day. It is so easy to let the negatives grind you down and that is not fair on your loved ones who have not deserted you, whether it be on a temporary or permanent basis. And never give up hope!