Separating from SO after 5 years

Sarah • mommy to 3 handsome boys 👬🏾👶🏾 soon to be baby girl

So my SO and I have been going through alot this pass year. From his father passing away to a miscarriage to truth issues. I have tried to be there for him but he keeps pushing me away. My SO and I have been together for 5 years. We have 2 children and one coming in April. We have decided to go out separate way for so many reasons. But we still live together until March when our lease is up. I will be moving back in with my mom to help me save money. My SO is very upset because I said I'm moving back to Alabama where I have family. I am very emotional and overwhelmed with the whole situation. I will be starting over with 3 kids by myself. All I wanna do cry but I cant because I have stay strong for my kids and act like everything is ohkay but I'm at my breaking point I just dont know what to do.