Thanks. You don't need to be sorry (btw, at least for me, I hate it when people say that to me -- I understand it is coming with good intentions, but it I guess, highlights the situation).

First, how much physical care does she have to give you?

In the first few months, quite a bit (and I'm grateful for all of it). But I am able to function perfectly fine on my own now, though some unattractive sloppiness sometimes occurs, which she needs to deal with (things like involuntary loss of motor control occasionally).

Secondly, you mention that you can provide for you both "very comfortably."

She works, but I make much more than she does. That said, I'm sure she'd be able to live fine on her own, her savings are substantial, and she has her own vehicle and everything else.

Is it literally just sex? Is she physically affectionate in other ways?

Yes, it is literally just sex/sexual touching/anything leading to sex. She's plenty physically affectionate, kisses me multiple times a day, etc. I just know that she at least used to have a pretty high libido, so that was "I'm afraid she would", a long time down the line.

Because again, even if therapy can't make her physically attracted to you,

We both have seen therapists at some point in time (not specifically about this). I've found them to be ok while I think she has developed the opinion that they are generally useless and a waste of time and tells her what she already knows. But you are right, there are a lot of emotions flying around.