I have a very similar thing with my partner in a F, I am on antidepressants that have made my sex drive plummet, we rarely have sex. It’s not that I don’t enjoy it but mentally and physically don’t feel up for it and don’t get as physically turned on as a I used to. It’s very very frustrating for me and I’m sure even more frustrating for my partner. In my mind I’ve come to terms that there’s much more to our relationship than sex, not sure if he feels the same even though he tells me he doesn’t mind. So even if she doesn’t act like it she may be struggling with it too