My Selfish Feelings

So, in the past week I've only gotten one email. It consisted of one semi long sentence telling me he's okay, he's busy and tired. I know they're busy, but I write him EVERY DAY, sometimes twice a day. It hurts checking my email ten times a day and every time nothing!! It doesn't take that long to write a sentence...Does it? Maybe I'm just too selfish, I mean my husband is out there serving our country and I'm being petty about not getting another email in three days? I feel pitiful, but at the same time I think if he loved me wouldn't he care that I sit here worried because I DON'T hear from him for days at a time. I feel at war with myself right now. I feel like I need to be a dutiful wife and just keep my mouth shut and realize that there are going to be times that he can't contact me. Luckily, I don't express my feelings to him because I don't want to be the cause of his stress, so I can keep my selfish feelings to myself and not cause a rift...