Hermione cast him a doubtful glance. "Are you sure? Because I'm ruining things for you, otherwise." And he had been rather mad. She would stay if he really wanted her to.
"It hasn't been just you for a while now," she pointed out with a half-smile; even if the ring was recent. "But you said that you wouldn't say no if I asked you, and I knew you wouldn't say no even if I did have an inclination to ask you, so isn't the end result the same, anyway?" That was just basic logic.