Welcome, Wendi!
Unfortunately you're not eligible for the military support system, which helps a lot keeping families going while one parent is deployed. Many contracting companies are full of retired or former military, so you might check and see if they offer anything like family support groups.
The best advice I have for you is to be sure you are taking good care of yourself. It's like the airplane oxygen mask thing...you have to be breathing to take care of your children. Self care is not selfish!
Find some kind of support network - church, neighborhood, fellow mothers of Girl Scouts (or whatever applies).
I have no first hand experience with your problem (I never deployed, and my DH's many deployments were before I came into the picture), but I think you get through it one day (or one hour) at a time.
My DH says don't send him bad news - he has too much on his mind he MUST focus on to stay alive. He doesn't need to be burdened with things he can't do anything about. So don't tell him you have a leaky faucet, just get it fixed.
If you want him to look forward to all your communications, you need to have lots of good news for him.
So focus on the positive - there really are good things going on.
If he is writing you things that are disturbing to you, just don't read that part. He may need a safe place to vent - it's not important that you read it; it's important that he wrote it.
And send him lots of care packages.
Hang in there, and remember, this is a safe place to vent.
Keep us posted on how you are doing.

Gayle