Oh Pinki, not sure what to say to help you, expect that I really feel for what you are going through. You don't say if you are normally with him in person or if it is an online relationship. Not that it makes a big difference at the moment!
I assume he is still in contact with you while he is away, though understand it could be a lot different to what you have been used to. If he is in email or phone contact, is it possible for him to give you some tasks for you to do? Are there some things you can do each day/week that can help you to feel his control?
The best advice I can give you is to feel his love and know that I am sure he would love to be back with you too. I had a situation a few weeks ago where it seems like my online Master would be taking a job that would have meant he no longer would have been able to continue as my Master. What pulled me through was the strength of his love, and even though the job did not happen, I still felt I would be okay.
Hope this has helped in some way.
Know you are in my thoughts.
(( hugs ))
AG