Last few months of deployment

Hi ladies, my boyfriend's deployment is coming to an end soon and I could not be happier that it is. We had a tough go of it and even broke up for 2 months. We're back together and for the most part everything is great! But I've noticed that with his time over there winding down he gets moody. I know it's cause he's over this place and just wants to get home. But it's like I can only get small waves of him being happy and affectionate and then he gets pissed off again. Is this normal? Have y'all experienced that with your boyfriends/ spouses?? Trying not to overreact with him too much but it still hurts sometimes haha