Dear L,
What a horrible story, I'm really sorry to hear it. As Christopher said in the last message, cancer really does weed out the riff-raff when it comes to who is actually on our side after a cancer dx. I was abandoned 'en masse' by my social circle after my breast cancer dx 8 yrs ago, only one true friend remained, plus my husband. I live thousands of miles from my family (left home at 17, have always been a wanderer). Having been in the spotlight all my life as a professional musician it was real wake up call about the reality of those relationships, it hurt so bad and still does, really. I don't miss any of it, or the people anymore, though. Cancer redefines how you look at and live your life.
Without family to rely on, plus an insensitive partner, it must be quite unbearable for you. I hope there is at least one friend that will be there for you when you need a shoulder. Sometimes friends appear out of the most unexpected places. But if you don't reach out it may never appear.
If I were you I'd tell your doctor. Stress and depression are bad for you. Ask for a consult with a social worker in the hospital, or if there is a cancer suppport group you can join. This would be better than nothing, that's for sure.
Where do you live? Maybe we can guide you somewhere for support, in the meantime you have us.
Hugs to you.
Wendy