I feel like this too and it’s killing me. Every time I try to confront him he shuts down and completely ignores me and the baby for hours
Is he paying attention to your child? Have you said anything? My husband dealt with post partum depression with our first (yes dads can get it too) and it made him super distant and we went through like 9 months of poor communication and fighting because he didnt realize that's what was happening so couldnt tell me.
Let him know