jsaad didn't you post up a video a while back of you proposing to the girl?
at this stage i don't think there's any more advice necessary, i think you've simply learned from your mistake. my approach would have been different, however. her looking through my private stuff would have been first on the agenda, apologizing for what i'd done would have been second.
that said, it was a pretty stupid thing for you to do regardless of whether she sees it or not. as long as there's no back story and it was a genuine one-off then i think an apology should suffice. if there is a back story, you need to re-think things amigo.