"I'm starting to feel like this is an all-give-no-take relationship. And I've barely asked for anything." She says it because it's the kind of thing you say, glancing and inexact, in situations like these. It only occurs to her belatedly that it's not a lie. She has been giving him everything, and for what? When this is over, she needs to reassess the situation, make sure it's worth keeping up with. This could be dangerous, too close and too personal. But to quit the field now would be showing weakness. She tries to keep any misgivings out of her face.