Thinking about leaving, adult children in home

I am seriously thinking about ending my marriage. It has had issues for awhile. Tonight my husband got drunk and very aggressive with me. He didn’t touch me but swore, yelled, got in my face and walked out. I threatened to call the cops if he drove so he threw the keys at me. My kids are 20 and 21. One was watching all this happen. I’m devastated as what I swore would never happen, did. My kids see their dad with a drinking problem and possibly a divorce in their family. ( I came from a very traumatic childhood with domestic violence alcohol and divorce).

My questions are:

1. how do I even proceed with this having adult kids in college living at home? I can’t afford rent alone for the three of us. But also they cannot contribute yet! I don’t want to implode their lives. I might have to stay until they are out of the house.

2. how do you separate but live in the same home? Any tips/advice?

I don’t think either one of us has a place to go on “off weeks” but we could I guess. But that implies our entire life! And becomes real and people would know.

I’m very lost. Welcome ANY advice. We have problems but I thought we loved each other and could work it out. Maybe we can’t and shouldn’t 😞