Well I've never been married,but i've been on the losing end of a couple of majors relationships.
1. Your heart doesn't stop beating just cuz you're depressed. Life goes on. Might as well go with it.
2. Keep yourself busy and surrounded by friends. It'll keep you from thinking about all that stuff. It's pretty much pointless to, anyways. Won't fix anything. It'll only make you sick.
3. People don't re-evaluate their lives without a reason. There's got to be a trigger. Maybe it was being in active duty. Maybe she met someone. Either way, though, she's a flake and it's better to find out sooner or later.
4. You lived up to your end of the deal. Sorry she didn't, but you deserve better than that anyways. Give yourself some time to get over it, but go find yourself someone better.
5. She's "damaged goods" just like bad fruit. Don't forget that. You don't want damaged goods. And any smart guy knowing her past and what she did to you won't want damaged goods, either.
6. Aside from a broken heart, you're getting out just about scott free. Chalk it up to practice for a better marriage next time and move on.