That is not the case here. I could think of dozens of things that could keep a person from entering a house, but she was not removed from him and he did not leave her. Getting slapped or called ugly names or told you cannot have friends over is not the same as packing up and leaving you to pay the bills, raise the kids, and be lonely. And a planned separation so that the situation my improve with prayer and guidance is also not abandonment, even though the couple is not living together.
You probably wouldn't want to come to this marriage counselor.
I do believe in separation as one step in a progression that hopefully ends in restoration. BUT, if it doesn't end in restoration, then I consider it to be abandonment by an unbeliever.