You have to adapt to grown-up life. You have to take care of your self well while he is far away. You have to believe he loves you and there is a love that can be eternal and survive all the hardships. You won't hold on without all these firm belief.
With the love you have for him, give him a little more time to figour out his mind. Couple will be really separated if they are arranged by destiny. True love won't fade away.
Set your goals, take care of your single life while you are alone, don't push him, understand him. Every time when you guys get in contact, just try to be a good old friend. Nice to him, gentle and mild. A women's most powerful weapon is not pride but gentle.
Please remember this for every relationship you will take. This is the kindest warning ever.