My sister used to be really bad about this too.
Now, she knew full well that she married a man who had hunted and fished his entire life. I guess she was hoping he would just quit all of that once they got married. Nope.
She cried, had to find someone to come to the house to stay with her because she just couldn't be in the house alone without him.
It started causing problems because she would get pouty and pissy for the week before he left. And then, she was practically inconsolable when he was gone. Dang. I stayed with her once, but that was enough. Dang, I had a hard time watching a grown woman act like that, and I LOVE my sister.
I said, "Chica...you need an attitude adjustment. Surely, there is something you can find to occupy yourself and enjoy while he's gone. He's not going to quit hunting and fishing and bringing food home for the family. That's his "thing". You need to find your own "thing". She started making friends with some of the other wives who were like, "Cry when they're gone? Heck no. We help them pack. We can go to bed when we want, watch what we want on TV, take nice long soaks in the tub, we get together for brunch at each other's homes, spend the weekend going to yard sales or getting our nails done. We don't have to cook if we don't feel like it and we're happy when they come home."
Now, she's a seasoned pro at having "her" time while her husband is gone. Often there is no cell service where he's at and if she doesn't hear from him for a few days, she doesn't freak out about it. He makes a point of driving to a location where he does have service to call her so she won't worry, but he doesn't promise it will be on a certain day or time because it's not always possible to stick to that.
She still misses him, of course, but gone is the woman who fell to pieces over her husband being away from her.
Their marriage is a lot better for it.
Work on finding things for you and it will get better.
Best wishes.