I sometimes say that being a caregiver is harder than being a patient. And your patient is having the LOOOOOOOOOOOOOOOOOOOOOOOOOOOONNNNNNNNNNNG term Blues.
This treatment, although successful, has been a Long haul. I remember the adrenelin rush when first diagnosed and the determination during the surgeries. And then the recovery..... The first few weeks were great; making strides every day..... But as time dragged out and niggling problems wouldn't clear up, I would fall into a funk and fear that I would not get better. But something always shook me back to a positive mindset.
I hope the depression is just a funk and not a constant thing. Maybe you need some new experiences or people who can give you a boost. Maybe a night out in a new location. Just something to let you know that life is not the same old thing and you ARE on the road to recovery.
I know it is hard, but my wife shocked me back to "The Real World" by announcing that she was "getting back to her life" and I could live in the cancer world or "Get to It!"
I was surprised. But after a fashion, I started to get back to it.
Here's to hoping you can too.
George