Hmm, I see no issues from your explanation. The girl should have listened to your explanation have.
Well things like this happens but it is not your fault and there is absolutely nothing to feel regret over. She didn't want to commit so why do you still take responsibility for her actions.
My candid opinion is for you to see such as a bad experiment and let it go as it is stopping you from believing in yourself when it comes to relationships.
RE: A Futile Apology : Based On True Life Experience