Quote: One of my thoughts was that I could move into the guest room.
From what I've read here on other threads, moving into another room is NOT going to help you at all. If you think that the "virtual wall" between you and H is large and growing, just imagine what the "physical wall" of being in separate rooms will do. Others who have done this may be able to comment on how it makes each partner feel. I would imagine that moving back into the shared bedroom after moving out would be difficult.
As far as "personal space" around a Finn... well... how did you manage to have 4 children if H likes his personal space?? He's your H, and you're his W. The personal space issue shouldn't be huge, should it?