I’ve just moved into the spare room. Not insomnia but DH’s snoring does make sleep difficult!
I felt I would be more comfortable with extra pillows to support my arthritic hips and a much lighter duvet to cope with overheating.
I agonised about moving out but it’s honestly the best thing for both of us. DH has adjusted the bed to his personal preferences, an enormously heavy weighted blanket. I have a cooling mattress and a full length body pillow.
Honestly, give separate rooms a go, it’s not the end of anything but the opportunity to have the most restful sleep you can get, for both of you. It certainly has removed the guilt I had about disturbing him. I sure you feel the same.
And, as a friend said to me, you can always “visit” each other!