Well, that's good. But that doesn't mean you won't slip up in the future. Everyone makes mistakes.
Yes, but you need to let her take care of you too. You two are partners in this. I guess it's good that you're asking for advice on a message board, but you still need to talk to someone, in person. It's alright to be optimistic for her, but you need an outlet for your feelings as well. That's how you deal, when these kinds of issues arise. Er, I'm sorry if I'm just telling you things you already know.
What is it that you're uncomfortable with exactly?