How should I feel

Patricia
My boyfriend and I have been together for almost 7 years and have a beautiful 4 year old son together. We discussed having another child this past summer and he agreed but then we went through a lot of changes and he changed his mind. Unfortunately I ended up pregnant and he got mad and blamed me saying I did it on purpose. Eventually he sort of came around but he is not super involved with my pregnancy he has been to every doctor appointment but doesn't want to talk about names, doesn't want to feel my belly if I say the baby is moving.. just feels so distant at times. But if I have pregnancy cravings or anything he will jump right away to get me whatever I want and if I think there is something wrong or have pain he seems genuinely concerned. it's confusing because he was not ready for our son and understandably afraid and once he was born things changed. I don't want to give myself false hope thinking he will fall in love with this baby once it's here and it never happens. I just want to feel that support and closeness like I see other women have when they are pregnant. I'm only 4 months so there is still plenty of time but how long should I deal with his distant behavior?