Need help writing a letter..?

Well I've liked this guy since 8th grade. and we kinda got connected last summer.. Then 9th grade started everything just got all messed up because we went to different high schools.. So then we drifted apart.. I haven't talk to him for long time.. After he said both of us should just move on. Even though he told me that I never gotten over him. So now 9th grade is over and its summer. And his leaving and i wanted to write to him but i have no clue how to start it. anybody want to help? :)