I agree, it's not like he is going to a party, he is going to war. His time will be very limited and controlled in that environment. He's not going to have a lot of time to think about OP. When he lays in bed at night after a tense day, he will most likely be thinking of what is secure. YOU.
I would GAL too. Use this oportunity to rediscover yourself and make any changes in you, you feel is neccessary. He will wonder what your up to! As dangerous as this can be, it could also be exactly what your marriage needs to make it perfect!
Learn to laugh at it. People are people and everyone is human. Choose how you will act and don't re-act.