I have to say goodbye to my BEST friend..im devestated!!!?

One of my BEST friends is an 8th grader..i am 7th...i just met her this year..but we are sooo close!!! We have an equal friendship...she is so cool and funny and amazing and i can count on her for absolutely everything!!...She sits next to me in chorus and on the other side of me in that cl is my life-long friend who is a 7th grader as well, she has the same type of friendship as i do with our 8th grade friend..but hse is going 2 highschool nent year and we are staying in jr high...we will see each other occionaly, and we will txt and IM each other every day...but i know that this friendship wont ever be as strong as it is now...we only have 2 more school days together and then we are having a little end of the year movie night at my house..im gonna miss her so sososososososososososo much..i love her like a sister in every way possible..if i was a guy i would want 2 marry her..thats how much i love her..what should i do to say goodbye?..im so sosososo sad.. :(