My husband and I had our third DC 10 months ago. Our other DC are aged 10 and 6 so a fairly big gap. The decision to have our third child was made by both of us but it was initially my idea and was something we discussed on and off for about 2 years.
Anyway, at about six months pregnant he started to get cold feet about it all and about six weeks before I gave birth he told me that he’d changed his mind, didn’t want another baby and if he could turn back time he would undo it. It was obviously very upsetting at that time as I really could have done with his support but deep down I hoped he’d feel differently once the baby was born.
He didn’t. In the first six months he made next to no effort to bond with her, we had a lot of arguments, he went away a lot with work, started drinking too much and i was often left on my own trying to hold everything together.
Now he is trying to make more of an effort to bond with our baby and I think he does love her but he says he feels trapped by the restrictions of having a baby again, he’s very envious of friends who no longer have these ties, he drinks and goes out for ‘escapism’ and often lies to me about it, he tells me that he loves our baby but she doesn’t enhance his life in any way, and he blames me entirely for putting him in this position because I was the one who wanted another baby. He claims he only did it to make me happy and he says he thought I would resent him if he said no. I distinctly remember at the time I told him that if it wasn’t what he wanted he only had to tell me and it would be conversation over because I firmly believe that if one person doesn’t want a baby you don’t have a baby. I told him that numerous times but he only said things like he thought it would be lovely to have another DC, if it’s what I wanted he would be up for it (admittedly now I realise I should have read more into this at the time, but I thought he meant it because we both knew I would be doing most of the childcare).
I don’t know what to do. Sometimes I feel like our marriage is over if he feels like this about his child as I do not want her growing up in a toxic environment where she is not loved as much as the other two. We have started marriage counselling but I don’t think it will help with his negative feelings towards his child. I am suffering with depression and spend most of my days crying because I feel like my beautiful family is falling apart. My oldest DC has been asking questions about why we have been arguing (we don’t argue in front of our DC, it’s usually after they are in bed but it seems that he’s not asleep and can hear us), why I’m crying so frequently and why his friends parents split up so he’s obviously worried. My 6yo has been misbehaving in school and has also been noticeably more withdrawn than usual...this prompted her teacher to ask me whether everything was ok at home, and our baby has developed severe separation anxiety and I can’t help but wonder if it’s because she know Mummy is very unhappy. I’m just so angry with him for putting us through this. But I also know it’s completely out of character. We’ve been together for 14 years and he’s always been this ray of positivity, proactive, always laughing and doing things, the most devoted Dad so I can’t help wondering if he’s in the grips of depression. I don’t know what to do. I feel utterly helpless and like I’m watching my family fall apart 
I’m sorry it’s such a long post. I was unsure of whether to put this in relationships or mental health, but whenever I post in relationships I just get a barrage of ‘LTB’ so I was hoping I might get a different perspective if I posted here.