Has anyone dealt with PTSD or depression in their marriage?

[andi]

Has anyone dealt with PTSD or depression in their marriage? I really think my husband is depressed. He told me on the phone the other day that he is "just numb" and that he's "taking a break". Basically, what he is doing on this deployment (he's gone for a month right now) is working from sun up to sun down - non stop. He told me he thinks he's lost another 10 pounds...on top of the 25 he's already lost. I'm worried about him. I love him so much and just want to do what I can to get us back on track. Any advice on depression or PTSD or where I might find more info would be helpful...
My husband is a Soldier. His best friend was KIA this past January. Things just seem to be piling up...the death of his friend, survivor's guilt, hates his job. Just looking for a ray of sunshine here. I know I need to be patient....maybe someone else has gone through this and can offer some insight?