Nelie,
He could also be grieving the life he had with you prior to the cancer and anger is one of the stages of grief (as well as confusion and several others). My wife had a nervous breakdown after I recovered - the disease is very hard on the caregivers. I even had close friends who abandoned me because seeing their own mortality through me was too much for them.

It would also be quite natural for you to be suffering from depression from the disease as well.

But as Cindy, Amy, Cathy and others have said - we are your extended family and are here for you. We're pulling for you both.