You made a huge difference in his life already by thinking of and visiting him , good for you...When your ill , thats when you find out how precious friends are.
Three years ago I lost my hunting partner to cancer..He smoked two packs a day for 40 years , and it finally caught up to him... I went to see him often and just sat with him and chatted , he appreciated that alot... It was hard tho , watching him die by inches , a big Ukrainian man of 265 lbs go down to to 100 lbs... I have not hunted much since then , but think of him all the time , especially when I am reloading or shooting...
Lets all of us be sure and check up on our friends , yes , life is too short for sure...
I pray your friend will pull through okay , and you two enjoy time together...
ALl the best
Bob