What would you do if your wife of 20 years abandoned you after you were diagnosed with cancer?

This did not happen to me. It happened to a childhood friend of mine. Someone who I knew since we were eleven. He had a golf ball sized tumor in his stomach, and started chemo. Doc says he has about a 90% chance of recovery, no surgeries yet though as it's still too big. His wife literally told him "I am sorry I just cannot see being with someone as sick as you for the long term." and she left him.
What would you do if your wife of 20 years abandoned you after you were diagnosed with cancer?
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