MrBond - you crack me up. However your words ring true.
It has never made sense to me when people leave a home when they don't want a divorce. If it were me, I'd set a specific date to move back in. Tell her she's welcome to move if she's too uncomfortable living together, but you will do you very best to avoid the fighting. That's my opinion, unless there are other extenuating circumstances.
Then, man up, and stop fighting like Mr. Bond said. If you get "annoyed by her attitude", then go somewhere else and do something constructive. Bite your tongue.