Again, thank you all for your opinions which have helped me realise a few things that I am reluctant to face up to.
When I was a child, I spent a lot of time with this friend and her family. Her parents were wonderful to me, treated me as one of their own, took me on holidays abroad and, as I had lost my father at a young age, her dad became a father figure to me, teaching me to ride a bike, swim etc. in fact my son is named in his honour.
Over the years I have detected a change in my friend's attitude, especially when I became a grandmother. She did send a card last year when my husband died, but that was about it. She seems to be jealous of something, though I can't for the life of me think what she could possibly have to be jealous about. She still has both parents, children, siblings, husband, all alive and well, although she hasn't spoken to her sister for over ten years.
I don't think she has a clue how I have struggled these past few years. She has always known when I have been staying with my sister in Kent but never made any effort to suggest meeting half-way somewhere, unlike my poor friend with the Brain tumour who, even when she wasn't well, came up to London for the day last year when I was here, or my friend from the Isle of Man who came over to Malta for DH's funeral, and so many others who have been so supportive.
Oh dear, I have rambled on a bit. Apologies. Thanks again for your kindness. It means such a lot.