I am so sorry, I lost my grandfather to lung cancer too and it was terrible
Even now, 7 years on I think about him every day and it breaks my heart that he won't ever see my two beautiful dds. I know they would have loved him very much.
When it does happen it takes a long time to get over the rawness of it but it does get easier, you will never forget him and little things will set you off again. There will be a time when you will think of him and remember the good times and smile.
Thinking of you and your family and wishing him some more pain free time with you all.
I know it must feel like no one is doing anything by him not getting treatment but my grandfather took the radiotherapy as he didn't want to believe there was no hope. The side effects from that made him have a terrible quality of life in his last few weeks and I know he regretted it.
I just wanted to let you know I visited him the other day, it was the first time I had been to his new place and it was lovely, he really enjoyed having his great grandsons there, Im looking forward to going again.
I feel alot better for doing so, but still feel really about it all.