Its a really interesting topic - at first I was "hurt" by my DD's behaviour but since then I have thought things through and accepted that she has her own Life to live, perhaps I won't be part of it just now but instead of over-reacting and making it into a drama, focus on all the wonderful positive people in my Life, my Sons and their partners, my gran-daughters, friends, work colleagues and all the exciting things I haven't managed to do yet as I was a Mother from a very early age and for most of my adult Life I have had to deal with everyone's muddles and problems!
So focus instead on my Health and well-being, looking and feeling great, holistically and who knows what may happen in the future! Only time will tell. Who knows what's going on for my DD, she is sensitive and shy and its important for her to build her family unit. So instead of being "hurt" by her and reacting in a childish way get on with being the best I can be for myself first. Then if she returns or requests to see me I won't have neglected myself and the whole of my Life. What a surprise for her that if she ever returns to see me in my Full glory instead of a depressed, negative, old woman! Lol.
I really think the times we live in and the technology have changed people, and young people have very different issues to deal with than when we were younger so its just about understanding what they have to deal with and it isn't easy. I look around me and see young people getting murdered, dying early, suffering from health conditions that are mostly preventable because people neglect themselves just trying to stay above "water", definitely in the inner cities like London. Best to be the bigger person and show some understanding for them. Keep focused on being Happy with self, stay balanced, create a social Life, have hobbies and interests, leave the light on for the children to "return" when they want to but draw boundaries about Bank of Mum, disrespectful behaviour and stick to it. In my situation I will not set myself up to be "used" just for money by my child and don't be quite so available, not in a grudgeful way just so they also learn that WE do MATTER.