How do I break up with my fiance

We've been together for almost ten years. Took 9 years to propose. We've been in this toxic cycle for so cycle. He love bombs then the cold shoulder. Last week he screamed at me infront of our 6 year old and 10 month old. We talked and I told him I couldn't marry him like this and he said he'd work on things and he was sorry, but I'm just not in love with him anymore. I just don't have the energy to fight anymore and I'm ready to be treated better and start loving myself again. I can't let my daughter watch this happen. I don't have a job but my mom and step dad offered a room for me and my girls but I'm kinda scared to confront him and do it. What do I say and how to do it

I don't want to hurt him or try to get me to stay

I'm feeling lots of guilt because I don't want to hurt him

After I become guilty, I make myself stay because our family, my life built together, and Honestly I just don't know how to word it or do it.

:( I think we could be incredible friends and co parents

But I know this is not something he'll easily accept and I will miss my home so much