He has a type of cancer that has no cure? OMG. I feel like a schmuck. I had no idea. My heart goes out to both of you of course.
It sounds like you need a good heart to heart about this. I understand your desire not to deprive him of something he enjoys, but at the same time, your own health is important, notwithstanding his own health issues. I think it's very natural to put his interests ahead of yours under the circumstances, but I still think there is room for compromise. If he loves you--and I assume he does--he'll want to make your well being, as well as his own, a priority.
Hugs,
K
Live with intention. Walk to the edge. Listen hard. Practice wellness. Play with abandon. Laugh. Choose with no regret. Continue to learn. Appreciate your friends. Do what you love. Live as if this is all there is.
--Mary Anne Radmacher