Hi nak, it sounds like you're feeling really lost right now?? You do have a lot to accept/to adjust to without her being right there for you, but she is still going to be there (just not physically there) and she is still going to care about you, and I'm guessing at the end of a phone/email/skype for you. What you've had with her distance isn't going to take away, nothing can take that away, right?? Distance is just a "thing", you're friendship runs deeper than that doesn't it?
But for now while it's hard perhaps you can focus on one/two things a week that are going to help you get through. Plan them out. They may be talking to her, talking to someone you're close to, scheduling in something to "look forward to", doing an activity that's going to help distract you/that you've enjoyed doing...............But you can plan in as many things as you need just to help you through. And for now, just one day at a time and then......just one week at a time.
Maybe some journalling will help you get out some of the bad feelings as well, and maybe even help remember the good times including some of the times that will be there for you again with her.
Alison