Seeing my fiancé no longer excites me

It started when I have to live with my parents na because I just gave birth and I need a companion, specifically, my mom to help me take care of my new born because I'm a first time mom. Our house is just 30 to 45 minutes drive from my parent's house.. and because he is working in a BPO Industry (graveyard shift), he can only visit us 1 to 2 times during his working days para hindi maging puyat kasi he needs some rest, too, pero he takes me and my baby back to our own house naman every weekend so he can spend his day-off with us. He doesn't have any issues, he is fine. He is a very responsible father and a partner to me. Wala sya'ng problema s'kin. But why is it that I don't get the same excitement anymore everytime I see him? Para bang kung nandyan sya, I'm just like, "Ok." I love him so much and I always want him to be around especially that he will soon-to-be my husband and he is the father of my child. But why? Is it because my attention ay nandon na lahat sa baby ko? Or is it because naging comfortable na ako na hindi ko na sya nakikita or nakaka-bond often as usual? Is it because I'm just stress? Can anyone please enlighten me? Thank you.