People who moved around frequently probably have some good coping tips.
What worked for me?
NUMERO UNO-Find a love interest-even if it's someone you just think is a real looker! Some cutie that can make you smile and look forward to the thought of merely catching a glimpse!
Find a room where you can cry like a baby-no one can hear or see you and you can weep and wail! Get it all out.
Make it your quest to find some little trinket for those you are missing. Make something arty or practice a recipe. Each time you work on or think about this, it will help take your mind off missing them so much as you focus on the excitement of giving them something special when you see them again.
This helped me when my kids left for college.
Take photos of your daily routine and prepare a collection. It will help you see the humor in your situation. Try not to focus so much on how you feel, but how it will be when you return and everyone says-"Gee you look terrific!" or "Wow, have you ever changed." Look at it as an opportunity to do the "unexpected" without shocking people or being stuck in your pre-pegged hole.
You have the chance of a lifetime to gain some unique experiences. Don't throw it away by dwelling on what is TEMPORARILY absent.