I am so sorry, that you have to go through this nightmare.
Some men are just weak, that's my guess. A weak man can't handle big changes in their lives.
Maybe he is just confused and needs time to himself to get used to the idea, that you are sick for the rest of your live.
But I still think, that is not an excuse to abandon you finacially and emotionally, now that you need him more than ever.
I hope that he comes to his senses and man up, to be by your side, where he belongs.
We are here for you, to at least give you emotional support.