If anything just be honest to her how you felt and tell her(if you still see her). If anything, get her email address and keep in touch as friends. Then that way you can email her and let her know how much fun you had and how your happy you met her. As for anything beyond, I wouldn't dwell on it. There is alot of distance between the two of you, but it can't hurt to stay friends and to keep in touch.

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Appreciate the good times and learn from the bad times....