As a supporter with my own mental and physical health issues - I have often felt that there is simply no room for my own stuff in my relationship with my sufferer, and that is stressful in itself, and causes burnout.
I am expected to fix my problems on my own, and not tell them about my little victories. If I lose weight, or find the right meds to help with my mental illness, it's brushed off. And, even when I'm in the process of doing so, and am under a doctor's care for the issues they see me as having, they don't believe me or think I'm doing enough, even when the process isn't an instant fix. I have literally had to drive myself to the doctor when I had the flu because they couldn't take me because they had a bad day at work the day before (and it was their day off).
But I've taken time off my own work to take them to appointments, have lent an ear when things are overwhelming, have picked up the slack in chores when they are in pain. And, yes, celebrated their victories with them, no matter how small.
I'm not sure if this is the case with your relationship, but sometimes the constant awareness, or even the reminder of the ever-present illness, gets overwhelming. I actually thought at one point I wasn't being supportive enough and was being impatient and overreacting; so I started keeping a note of how often my sufferer would have a complaint about their health, their pain, or have to bail on something (helping with chores, groceries, dinner, watching a movie together at home) because of their issues. It was literally every day, sometimes multiple times a day. It was a lot of walking on eggshells, too.
I have no idea if you are able to lend support yourself when your supporter needs it, if they're suffering from supporter burnout, or what. Or maybe, as someone indicated, she wants to hear about the rest of you, too.
It is so amazing you are gaining relief from your therapy. Your supporter may just be in a place right now where her OWN stress cup is close to overflowing, so even the good news about illness is still illness news, and is too much.
t first I thought having a supportive partner might be all I needed, but quickly learned it was too much of a load for them, and me too, some days.
No need to carry another's load, just carry big love for them and active compassion for their struggle as gracefully as possible. May it be returned in kind.