Update: So yesterday was the first day/night with him home. He came home at 0730, all the children got up and had breakfast with him. I left them to it, and enjoyed my first lie in in months!! Then he came to my room and asked to borrow my phone charger, I gave it to him and asked how his night at work was. It was all very polite, borderline friendly even. I went out with children running errands for most if the day, and when we got home my D4 threw a monster tantrum, and woke H up. I was actually really glad the kids and I had to run out almost straight away to a play date. It was really awkward. We are both moving around our home and interacting with the children like normal, but barely speaking to each other. When we returned from the play date he was here, and I basically dropped the kids in, and ran out to church. I never get to go without the kids and actually concentrate and pray. He seemed ok with it, and even fed them their dinner. He left for work not long after I got in, but it didn't seem as awkward.
And then this morning he came home, and was almost friendly again. He came in and said a cheery good morning (in the past i was lucky to be acknowledged at all), and has even volunteered his plans for this evening - he is going out to dinner with his friends apparently.
I'm just not sure what to make of it. It is all such strange behaviour. I'm scared I'm getting too hopeful now he is home, and there are some small positives, that I am just setting myself up for a fall.