I'm so sad

I feel defeted. I promised to be strong for him but now all I want to do is cry. I miss him and I can just call him to tell him that. Soon it's going to get worse. He's in the army, just graduated basic, now he has 4 more months until he graduates military police training. Then he's planning to move to the other side of the world. I really need him, I feel like crap without him. Everyone just makes me feel like crap about everything I do. I just need advise I don't know what to do. I want to marry this man and we haber even said I love you, I know I want to be with him for the rest of my life. We've been together for a little under a year and I would give my life for him.