Keep standing firm, it's your home too and you're being perfectly accommodating in moving into another room for him if he plans to stay too. H is being a tool if he thinks that 'space' involves you living somewhere else hanging on for a call or text telling you when you're allowed to come back to your own house.
He might be mad at you for changing the goal posts on 'space' but that doesn't come close to the goal posts he's just moved with regard to the marriage and your future together - so fuck him and his huff.
In relation to the criticism you're getting with how quickly you left, did I read a different thread from these people?! I read someone who's husband had changed personality almost in the space of a week, started acting like he hated her, treating her with complete disregard - and you wonder why she went to stay with her parents after her husband drops the bombshell that he felt railroaded into marrying her. I'd have done the exact same thing as Garlic, partly because H requested space and partly to give me time to lick my wounds and recover from the shock.
Not everyone can face up to having it out then and there when something absolutely massive happens, some people like to give both parties time to consider their feelings. She's states about 100x now she's prepared to fight for this marriage BUT she's also preparing herself incase H turns round and decides that actually he just can't be bothered afterall - no shame in being proactive.