I have suffered from insomnia for many years.
My H needs to be up early for work. His job is physical and he gets tired.
So what started happening, many years ago now - perhaps 10 years ago- when we moved in, is that I would be trying to get to sleep and he'd get frustrated by my tossing and turning and looking at my phone. Or getting out of bed, back into bed etc. I used to really disturb him.
So I started sleeping on the sofa. I would start off sleeping next to him, but when I would inevitably be woken by my insomnia a couple of hours later, I would go to the sofa or spare room and just do whatever I like, until I could get back to sleep.
Then I was pregnant and the insomnia was even worse. So I continued. Then baby 1 came and as there was a lot of night time description, I moved out of the bed room to do all the nights, so he could sleep.
After that, I just kind of started co-sleeping with baby 1, as I was pregnant again and baby 1 was sick a lot. Baby 2 came along and I again took care of him on my own every night.
My babies are 2 and 4 now. They do need me there to fall asleep, but they sleep well, unless they're ill. But I don't really sleep in our bed anymore. I just sleep near them or in the spare room.
To be honest I like sleeping by myself. But H absolutely hates me for it and thinks I'm setting a bad example to the kids. He says it's also why he doesn't do nights and mornings. He said he would do it if I slept in bed with him.
Most of the time, what happens is that I go to put the kids to sleep and I literally just fall asleep with them and end up waking up there. I'm really really tired most of the time. I work full time and do all the nursery runs etc and dinners and wake ups and everything else for them.