I'm not the kind of guy that go strong and I prefer to let people choose for themselves, as you seem to wanna do with her. But if learned one thing in love, it's that some people do play like that with the heart of others.
Maybe she was honest and going "all or nothing" will be harsh, but there are better chances that she is, like 89% of us, brainwashed to romantic clichés and is just aroused by "strong man be bold" and this will tip the balance in your favor.
If she is the second type, never become too nice to her. People like that somehow feel that nice = boring (they never heard of originality apparently^^), and boring = byebye/cheating. As long as you always keep her wanting a bit, she'll be 100% into you.
Yes, that's fucked up. Welcome to the 89%.^^ Disney ain't its hands clean on that one.