This is not my first opportunity to take care of someone I love under these circumstances. My husband is sick now but I went through my Mothers breast cancer with her, caring for her just as I will my husband. My Mom's illness lasted 20 years, from breast cancer to brain tumors and she resided in a nursing home for the last 14 of those years.
I know what you feel when you say everything is about cancer. I spend my days working, caring and my evenings researching and discussing cancer.
BUT we ARE caregivers for one simple reason - we LOVE them.
Your feelings of wanting to run away are normal, what you need to do is still find some time for yourself. Get some time away from cancer and just relax. Maybe there is a hobby you can take up, go window shopping, garden, take up photography (everything looks so different when you are dealing with illness that you tend to see things you never took note of before).. or write a book about your years as a caretaker, There are web sites that will accept your writings and if that can help someone else WONDERFUL.. at the least it will help you.
L.