Wow hon - so so sorry that you're having to deal with this. Dealing with cancer is just when you need your partner most - it [censored] that because of his own fears, he can't stand with you better than this.
Some guys in this situation seem to fear the possibility of loss so much, that they'll run away rather than risk you dying on them.
He does sound depressed, and it's important for you not to argue with him, but gently point out that people can and do get "that feeling" back - that it is normal in a marriage to go through times when the feeling waxes and wanes.
And for you - not to be the bearer of bad news, but - be aware that more often than not, the is another woman in the equation. It doesn't mean your marriage can't be saved - but just be aware, if things aren't adding up, that there may be such a reason.
