i think he believes i am mad at him...

[smallfry83]

Ok, this is kinda long. So I apologize in advance. DB was supposed to come home for R&R in October. Then he was told that he would be coming home for good by the end of September. Last night I get an email from him.... He's not coming home Plus, he can't call and doesn't know when he'll be able to. I'm not sure about email.
He told me that he can't tell me what's going on (which I know is normal) due to the circumstances of his his job. All he could tell me is that the dynamic of his mission has changed. He said that he's not going to be coming home early and isn't sure that he will be able to come home for R&R.
I know that because of his job (which all I know is his rank, unit, and MOS, but I don't understand his MOS), he can't tell me what's going on. I understand that. But it makes me worry more because I don't understand what's going on. More of a worrying about what I don't know.
All he kept saying in his email is that he is sorry and that he wants me to understand that this is not his choice. I know it's not his choice and that if he had a choice in the matter, he'd be here with me. I have never once told him that I was mad at him for being deployed. I don't want him to think that I am blaming him for this.
Yes, I am hurt, disappointed and mad. But not with him. I am worried about him. I don't want anything to happen to him. And I am so afraid because I'll never know. We haven't had the "who's going to let me know if something happens talk." He's always been in what we considered a "relatively safe" place, although no place is really safe, huh? Because we met so close to his deployment and because he deployed earlier than planned, I've never met his family. Not really sure they know about me. DB told me that the only person there who knows he is seeing someone is his best friend. That's how private we kept our relationship.
Anyway. I don't want him to think that i think this is his fault. This is what I "signed up for" when I decided to be in this relationship. This is his job and it was there before I came along. So I don't blame him, I know it's not his fault, and I'm not mad at him. I've told him this over and over again, but he still feels so bad. How can I make him see that it's not him that I'm upset with, it's just the situation and me trying to deal with my feelings? I love DB more than anything and hate for him to blame himself. What should I do?