Do women get off on things like this? Consciously, most likely not. Unfortunately, most of the mind works in the subconscious. And subconsciously, yes this gives her a shot of self-confidence right to the dome.
Think about it. In a way, she conquered you. Her conscious mind won't let her think this way because after all she is a nice girl who would never do that, right? But behind all this, she won't admit it, but she feels extremely empowered and ready to move on to a more worthy male.
I know, harsh words but guess what? We've all been through it. Any guy who hasn't is simply lying. Hopefully you learn on your first mis-step and you don't make another 2 or 3 (I've seen many make the same mistake for years!).
You should feel empowered in your own self right now. You've observed your actions, found your mistake, and you're ready to move on and conquer it. In your mind you're still hurting from this girl, and that takes time. But you must push through the pain and realize that it's a blessing in disguise. In all likelihood, even if you played this out right, things would have ended sooner or later anyways. Sadly, most relationships do no matter how well you play it. Best of luck.