Will I be okay next year, while my best friend is away?

My best friend is studying abroad next year for an entire year. She is only allowed to skype/email once per month. We are both REALLY close at school and spend a lot of the weekends together. I still have other friends to talk to (I won’t be a complete loser) but she really understands me and vice versa. She is the one person I can really talk to about ANYTHING. anyway, with her gone next year, I’m afraid I won’t know who to talk to when I need advice, or who to go shopping with, etc. It really is a bummer she won’t be able to communicate with me during her year abroad. Also I’m super scared that things will be awkward between us when she gets back. What if she is a completely different person? What if she doesn’t remember any inside jokes? This concept really scares me. What if she doesn’t tell me her secrets anymore? Please give me any advice you can. This is the one topic I can’t discuss with her…