if I could take it all back and let another guy have all the guilt and pain for turning such a beautiful worthy girl into a nymph,
Why? If it hadn't been you it would have been someone else

Think yourself the lucky one...you got to help her complete her "education"!
I even got (had) a few good movies from it as insurance to keep the new one in check
Yikes! On dodgy ground there if by insurance you meant you planned to use them as blackmail if things went pearshaped.