Finally happened

[Mumnavigation]

I bee with my partner 19 years. It’s probably been coming for a while but yesterday/ today it became clear we have to separate. I love him still but we are toxic around each other and it isn’t fair on the kids. He’s left now I’m sure over next few days he’ll be back to collect some things etc.
i genuinely love him and I’m broken hearted but it needs to happen and it’s taking all my strength to parent right now. To look after the baby and the older ones without it effecting them trying to poker face that I’m fine it’s all fine it’s not fine!!!
it’s hard, I’m sad , I’m scared for the future and it’s taking all my energy to not text him and say just come back let’s just forget about it and bury my head in the sand again.
looking for someone to help me keep my resolve remind me that it’ll be ok that I’m doing the right thing and not just go back to what I know because the unknown is scarier

Of course you are doing the right thing. It's normal to doubt.

It will be OK 👍🏻

What have you tried as a couple to fix the relationship or resolve the issues?

I would reiterate what @Greatmate says. If you still live each other but have fallen into bad patterns of behaviour are you sure it’s not fixable.
is he not willing to work at things? You?

It’s normal to want to undue what’s happening because it’s painful and your mind wants u to b safe, if it’s the right thing it’s the right thing but you are absolutely going to feel wretched and want to turn back time and not say it, just get through a day at a time and see if the decision regret settles