My Grownup Children Are So Unhappy.

I'm 70 next month and I'm finding it so hard to cope with the constant low moods of my children. I've helped them all a lot with grandchildren to help make their lives a bit easier and of course because I dearly love them. But when I do go round I'm greeted with a miserable half hearted hello and then I feel the whole time that I'm not really wanted there. When I eventually leave, they can barely be bothered to look up to say goodbye. I don't have a partner so I just end up worrying about it for days until it happens again. Sometimes I wish I could go somewhere away and start a fresh life, but of course I would never really leave them in the lurch.