I haven't actually had an attempt, but suicide is on my mind a lot. If I didn't have my two little girls and I'm almost positive I wouldn't be around right now. My 2 year old and 4 year old daughters would be ruined if I weren't in the picture anymore.
Combat, at least for me, really took away my concern for myself. I got to the point that I just didn't care anymore while I was deployed and, to a large degree, it is still there.
(by the way, I'm also actively receiving treatment at the VA)
I would love to see more stuff like the diary you mentioned out there for the public to read. I've been mulling over various ideas for books that I'd like to see written regarding combat and how hard it is for vets to return to normal life after war for years. I've even written a couple of short sections and I have a rough outline of what I'd like it to be. To prevent frivolous wars from being inflicted on our kids, us struggling vets need to get our stories out there.
War, as most of us know, doesn't end when you leave the combat zone.