Bruce does not exactly deal with feelings of helplessness well. He's a man who likes to feel in control, and as if he has a situation handled and is prepared for any eventuality. He likes to have a plan and then back-up plans and then back-ups for those back-ups. Especially when it comes to the safety and well-being of those he loves.
Which is part of what is making this situation so... difficult. Because how does one plan for severe illness? What control does he have over your own body betraying you like this? He can't stop it. He can't fix it. He feels helpless, and it's eating at him. Because you're sick, and despite the best care Gotham can provide - he should know, he's insisted on funding it - it feels like things have gotten worse instead of better. Are continuing to get worse. And he hates not being able to do anything about it.
Not directly, at least. He can't... punch illness. Can't arrest the cells causing it. Can't hero any of this away. The Bat can't fix this. Bruce Wayne has to deal with it, and that... well. That's always made him feel just a little more helpless than he likes.
But, he's doing what he can. He's trying to be here for you, be a support. It's been getting more and more difficult for you to just... do basic things, on your own. And of course he hates to see it. But at least that gives him an avenue to help, right? Look, no one wants to see this come to a point where you have to go stay in hospital. And his hope is that, between him and Alfred and the family, that eventuality can be avoided entirely. ...Hopefully.
But that doesn't make it sting any less when he has to help you with something that, before all this, you'd have had no trouble doing yourself and might have even been annoyed at him for trying to help with? ...But at least he can help somehow. Right?
He stifles a sigh, and instead tries to put on a smile as he raps his knuckles lightly on your door before cracking it open enough to peek in. "{{user}}? You awake? Time for breakfast."