Has anybody really managed to finish a marriage with one narcissist while having young children?

I am new here. I shared my story recently and am amazed of all what I hear from your experiences here. It seems to be exactly how i have been living in the last 10 years.
I have a 10 months old daughter and 5 years old son.
I used to think my husband was an undiagnosed Borderline, but narcissist matches with what i live daily far more than borderline.
At the moment he is giving me the silence treatment. It started frm the 21st of Nov so 4 weeks in total. He has been horrible to me in between and I am left to look after the children own my own, do all the house work and doesnt even look at my face.
I only recently came across this website so it might take me a while to actually plan my next step. I was still hopeful there would be a way forward, some improvement, but, again and again, i feel stuck. He did this to me in the first 5 months of our daughter and at the same time last year.
When I was pregnant with her, back in July last year, we had an incident of domestic violence and I have a scar in my face. As i dont have any idea of how to leave him, do you think I could use some thing from the past to start making it sound like real to him? I am so afraid that in Christmas time next week he will try and talk to me again, but I dont know what to do. Just I just pretend everything is ok, as i dont have an exit plan yet? Shall I tell the truth? I really need your imputs. Do i say to him whom he really is now? or try to say i want to separate friendly ? He is a pastor (youth pastor ) in a church , so needs me to play my part to keep his position. can anyone give their insights? Is it possible to get the Narcissist out of the house instead? I just want some ideas and also to vent here, as I feel completely alone in this regard..Thank you