I do not agree with Theyremybiscuits, it does not mean that he is gone. We have separate bedroom too, and our DS is 17 mo. But we had separate bedrooms like for the last 5 years. We do work together though, altho not all day,. so giving each other a bit of space is good. Plus he snores, and I do not I hope , he likes hot thick duvets, I dont, he closes window at nigth, I dont, i like to read b4 go sleep, he does not plu he is a light sleepr. And we do have decent relationship. It really goes down though if I have not had enough sleep as then I get so irritable and snappy, and my DH gets snappy at me in return.
I think you need some help thegraylady. We had our own business, AND a baby, and NO HELP till he was 3 mo, we were on the verge of breaking up, as there was no help apaert from a cleaner twice a week. Then we decided to get baby sitter, things improved drastocallY! then my DS does not sleep thru the night too, and have to work from home, so we decided to get an au pair, its just brilliant..
the point is: you are just over tired, both of you, you need to get help from firends and maybe your PIL, only if they are not gonna complicate things. Mine would, so we keep them at bay
let us know how things go
i am sure you will sort things out