Welcome barbara
Oh dear I learn that lesson when my 20 something son went to NZ with his then girlfriend ( since wife) to look around and never came home, eldest daughter left for a partner in Europe and youngest daughter went toAfrica and has since settled nearer home but not in U.K. Eldest did return to home town
So 3 children and 7 grandchildren later I have tried very hard not to encroach on their lives so no I ve never felt like you Barbara I realised they all had their own lives and whatever time or attention I get from them is a big old bonus
I have a decent life with lots going on to keep me occupied
If you have 6 grandkids your children have been gone a good while I m surprised you are still finding it so hard to adjust