Dear Jackie
I'm affraid i don't have any survival techniques for you, but just wanted you to know you are not on your own out there. Do be kind to yourself and don't expect too much of yourself. The grief of daughters and wives is by the nature of things different. Trouble is, daughters still think you are their Mum, the one who should make things right, and in this case you can't – much as you'd love to.
these days just have to be lkived thorugh, but as Tom says, cling to those memories of good times, even if they bring a tear.
Do hope your break with your friend helps. Perhaps you can help the "going home again" by leaving some treats ready, maybe some special chocolates, or bath smellies. Although these are no way a substitute for all you will be missing, they will allow you to pamper yourself a little, which would be what Norman would have done.
Sending prayers and lots of love.
Mavis x