My girlfriend is having is having a very emotionally hard time, because her grandad is dying of cancer. She loves him very much, and I think it’s horrible for her because he only has about 6 months to live, and how does she spend that time with him?

I care about her more than anyone else right now, and I wish i could do something.
I wish i could stop her gandad from dying, but i know this is impossible.
I want her to know I am here for her, but I think she is a little wary of talking to me about the situation as I have never had to deal with it.

However, i would like to know if there is any way I could support her in her time of need. I know this will be difficult as I cannot fully relate experiences, as I am inexperienced in loss of loved ones, particulary grandparents, as all of mine died before I was even born.
I would really apreciate it if there was any advice for how I could help her, however small or large.