@Someone2Love I think what she was saying was that treating people as an end rather than a means was an ideal mindset to have. That is to say, it's best to respect people. However, she was telling Elvin that even if he doesn't treat her that way and just treats her as a tool she'll still be fine. She quoted Kant to establish that she knows what the right way to treat people is so that when she reveals she's fine being treated as a tool she's not saying it ignorantly.
Basically, she is saying she's not stupid and knows she is being treated as a tool but is fine with being treated as such
because it's Elvin, and because he's not doing it with malicious intent(as far as she is aware, anyway).