I'm done

I've been married to my high school sweetheart for a year now and it feels like something is fading already. It might also just be hormones due to being 37 weeks pregnant. I don't know some days I wonder if after my twins are born he'll even care. he just snaps at me at random for silly little mistakes or if I bring up our relatives. It also doesn't help that he's in the Navy preparing for a deployment at the end of the year so he's gone every other month with little to no contact. He loves his job, but hates his command so he's constantly grumpy when he comes home. I try to be considerate and let him have his space, but I want human interaction too. It doesn't help that I'm unemployed so I'm usually home alone doing the house chores and making dinner. he's the most amazing and sweetest man ever, but some days I wonder if the only reason he cares anymore is because I'm carrying his daughters. It makes me wonder what'll happen after they're born. Somebody please tell me I'm wrong and being irrational.