My husband just retired from the Army, after 20 years. You get used to the military life. It certainly has its perks too. Yes, it's scary when they deploy. We got lucky, we only had three deployments during our 13 year marriage. Dh has been through 5 deployments total. You really get used to it. Nowadays we have internet, and phones, emails, Skype, it's really not that bad. Yes, it's dangerous for our guys over there, especially as a Marine, but the more you think about it the more you drive yourself nuts, and it's not something you can do anything about anyway, so there's absolutely no point.
Keep busy, get a good routine going, that's my advice. Maybe find a project. I don't know if you have kids, but that alone will keep you very busy.
DON'T watch the news!!! If anything happens in your partner's unit, you will hear about it anyway. DON'T listen to rumors. A lot of military wives enjoy spreading rumors during deployments. Don't listen to them. Unless you hear it from your partner or the rear detachment (if the Marines have something like that), don't listen to it.
Good luck! And really, it's not that bad.