How did he manage when you went away on business? I wonder if he was looking forward to not being apart so much now that you're both retired. It's obvious that you need more 'space' than he does and I'm not surprised you find it irritating.
I'm concerned too that it may be the beginning of dementia or hopefully simply different needs. Either way you need to talk though it seems that you've tried that and it didn't work. You have my sympathy. This suggestion isn't meant to sound trivial but what about a shed? It could either be a 'she-shed' or a 'man-cave' and could at least provide a separate space for you.
Anger management!!! Help needed.
Nicola Sturgeon’s husband Peter Murrell re-arrested over SNP finances.