My husband's best friend died of brain cancer, too. He "would" have been our best man at our wedding :( My husband and he were always joking with each other, so when he told my husband he had brain cancer, my husband told him "well look at the bright side, they could always amputate", and his friend got a laugh... then he told him "hey, you're not as good looking as you think you are..." I swear those two were a trip and a half together.... anyway, my husband knew he liked to play his guitar, and sang pretty well too, so my husband got him time at a recording studio and helped him set up, and they made a whole CD of him singing and playing his guitar. Most songs were things he knew and liked, like a lot of slower Beatles tunes, and a few he wrote I guess.
I think, really, anything that would take your friend's mind off something horrificly scary would be such a blessing. IT's sad to see a dear friend slow down and die, esp. if in pain, but at the same time, how nice it is to know the time is short andso not waste any of it, ya know? You have an opportunity to make memories that you'll have to ride through your life without this person. In a way I wish so much I had that opportunity with my sister and my father, both who died suddenly and unexpectedly. Not that I would want anyone to suffer, I think a quick death is best in many ways, but then slower deaths have advantages, too... like tying up loose ends, and knowing enough to make each moment count. I wish I could turn back the clock, who doesn't... and spend more quality time with my loved ones who I miss so painfully.
(here I am crying again.... it never gets better, does it?)
Think about what things both you and she would enjoy doing together... would she like something like a hot air balloon ride? I think that's an AWESOME idea, personally. Is she afraid of heights, or would it also be something she'd have a wonderful time doing? I would think, you could go see a live show, but then, that's having fun but not spending quality time together. Something where you are both interacting, while enjoying an experience together.... have you thought about horseback riding? That's a great way to spend time together, there are many stables that will take you on a trail through the woods, that's awesome fun and a way to spend time together. Even someone with no riding experience will have fun doing this, they match up the horse with the experience level of the rider,and an experienced rider leads the way. Another nice time is camping, if the weather's good in your area. You can rough it with a tent, or they even rent RV's now I don't know prices, but that'd be fun, to take a road trip to somewhere you find on a map and spend at least a night or two at a campground, that's a lot of fun....
Well best wishes for you and your friend, it's good that you're taking the time to really think about what things you'de like to do now and not wasting time! And enjoy your friend, and don't feel goofy about getting sappy, people love to hear that you really love them, don't hold back.