Pie, I went through this with my husband 8 years ago. Stage I MLC. It took about 9 months of Hell before we were able to operate again as a normal couple.
Here I am again and asking myself the same questions, can I go through this again. At this stage, it's a moot question. He hasn't shown any sign of wanting to return. Not even having much to do at all with our kids and grands.
My suggestion to you is at this moment, don't expend any energy thinking about it. We all, myself included, want some type of timeline to this torture. There isn't one. It could go on for months or years. It's up to you how long you hang in there. I still keep a count in my mind of how long it's been since we split, but I'm only human, and I no longer let it occupy my mind.