Friend's Grandmother is dying.
A used to be very good friend's with a person, I went down a bad path and lost touch with a lot of friends, my boyfriend stayed very good friends with the guy however. Recently the former friend and I began to patch things up, but we're by no means close. My boyfriend recently expressed that the friend's grandmother is dying and the friend is very lost, and feels like no one is supporting him in the hard time. I'd like to show him that I support him, but I'm not really sure how to go about this. Two of my grandparents died when I was very young, and I've been fortunate enough to, in my adult life, not yet have to experience someone I felt close to dying.
What is appropriate for me to say, or do to help him in his time of need?