Having said that, don't help him to leave, let him leave. He wants to get an apartment, start buying furniture? Ok. But he wants you to find the lawyer or review his mover options? That's his responsibility. He wants out, let him out, but don't help him out. I don't think that you are doing this but keep it in mind - I struggled a bit with the grey area.
I'm actually the one that moved out, and he's been helping me move a bit. I didn't really take anything with me though. I did get the separation paperwork drawn up, but I will not convert it to a divorce. If he wants to turn it into a divorce, it will be up to him to turn in the final forms.