Of course you won't forget her. My childhood best friend and a classmate was Sally. She and I used to spend hours horseback riding on her father's farm in NC. When I was 10 (1950s), my family moved to western NY. Sally and I exchanged snail mail (all there was back then -- long distance phone calls were too expensive) and occasional cards and notes for birthdays, graduation, weddings, babies born, and on holidays. Years later, we are still friends.
Nowadays there are so many ways to stay in touch -- cell phone and email and Skype and chat boards and so on -- so that shouldn't be a problem. Just realize that the two of you will be moving on in life and going in different directions. I hope you can continue to share your adventures with each other just like Sally and I have done.

