It means she believes in equality of the sexes. It means that she's not afraid to go after something she wants. It means that she won't buy into stereotypical behaviour of the sexes. It means that she's emotionally strong enough to handle rejection.
You will probably also find that she's more than happy to take turns paying - one of the benefits of equality.
Never regret anything that has happened in your life. It cannot be changed, forgotten or undone. So, take it as a lesson learned and move on.