What has your partner said/done after you've told him you want to separate? Fairly sure this is not unique, but my H has basically acted as though the conversation hasn't happened!!!! Not for the first time a conversation like this has been ignored, either..
I know he won't want to move out; though he has options in terms of family-owned rentals. Also-he's barely been present in our 4 childrens' lives & travels lots with work. So out of necessity, I operate as though I'm a single mum 80% of the time anyway!
It's a stressful time for both of us for a number of other reasons, but I'm 100% sure I don't want to continue living with him partly due to how he handles his stress/his lack of empathy & support for me.
Not sure how to proceed TBH...interested to hear others' stories....