My poor dog.....

He has been feeling so sad and depressed lately now that he knows there's a baby coming. I know he senses it & he's been feeling left out cause me and the hubby are spending more time together by figuring out baby stuff & so on... 
yes of course I love on my dog and show him attention  but I can't stand to see him like this. He stares at me with his sad eyes, sighs all the time, and idk .... I'd hate to see how he acts when the baby is here!! 😢😩😪😥😢
What do I do???