Love life failing because of pregnancy

Ever since I got pregnant it seems like my partner and I are growing apart. We don't talk as much and we are not spending much time together. He is very happy with my pregnancy because he glows when the baby is the topic of conversation. Maybe it's me he's not satisfied with ? Everything now it's routine. Day after day after day. No passion no sparks no anything between us. Even the sex is uniform since the pregnancy! We both have other children from previous relationships so we know the ropes! I'm not sure what it is or what I can do anymore to bring back the love to our relationship. He's in the living room I'm in the bedroom. The kids are asleep and he's on his phone and I'm on mine. I'm only 15 weeks and I don't know how long I can go on like this ! I need my baby back 💔