Will not be having a second baby

My husband is a very intelligent and hardworking man. We planned for our December baby and even had a miscarriage before. He read the books, went to my appointments, supported me during pregnancy, was overall great. Once our son got here though, it felt different. I understand the harsh reality that as a mother, we’re just going to do more. But it’s like he hardly has an interest in our baby. He’s openly said he looks forward to him getting older so he can enjoy him. I have to educate him on everything and how to do things. He gets upset when he can’t sooth the baby, but he doesn’t spend time with him. He makes time for his hobbies though. I KNOW I will not be doing this again. I adore my son but if I want to remain married, he will have to be an only child. I go back to work at the end of the month and my husband will have to watch him during the day when I work, and I’ll have him alone at night since he works night shifts. I’m so nervous about going back. At the end of the day, my husband is a good man. I’m just hurt at his lack of interest/involvement in our baby and it’s very unattractive.