How to say goodbye to my best friend?

Well my best friend is going to college soon and is going to be studying abroad. She's told me since 2 years ago that this would happen but I thought it was just her saying it and messing with me but she's actually going and I don't really know how to cope with this. We usually text everyday but she's gonna be really busy once she starts and plus the 10 hours time difference will affect us. Anyways, she's leaving in less than two weeks and I'll be seeing her twice within that time frame, once at a friends house and the other day will be when she leaves (my family will be taking her family to the airport.) I've also decided to make a really mini care package for her and give it to her before she gets on a plane. I was thinking of getting her an Alex and Ani sister bracelet because she's basically the sister I've never had, a mac lipstick and a meaningful note and some other makeup like foundation,mascara, and eyeliner. Should I get her anything else? How do I say goodbye to her? I'm gonna miss her so much. Just thinking about it makes me so upset because she's my right hand girl.