When I think about it I realised that I have slept alone, in my own room for the greater part of my life!!! Did so until I got married when I was 23 years old. Shared a normal size double bed with hubbie for the next 25 years.
Then it became impossible, his medical conditions caused me serious disturbance at night - which resulted in my own medical conditions deteriorating.
Horrible few years, with all the children still at home and all bedrooms full, I often used to wander round the house during the early hours carrying my pillow and a spare duvet trying to work out where to sleep. Often meant that I pulled of the cushions on the sofa and armchairs in the Lounge onto the floor and slept there. Had a recurring dream of accidently stumbling across a hidden room!!!!
When any of the children went away on holiday, etc. I would use their beds. Eventually, purchased a cheap sofa bed to go into lounge and used that - not perfect, as it meant it had to be stripped every morning and duvet, pillow, etc folded away in another room.
When marriage finally died, and he left, it was such a relief for me. Had double bed all to myself, and have never looked back. So for past thirty years have slept in my own room. For my 70th birthday I treated myself to an electric bed, which has been a godsend and for my 80th (this year) have treated myself to a silk /wool mix duvet.