Leaving cheating husband

For those who have left their husbands how do you do it?!
My husband has cheated on me (once that I know of) and I’ve tried my best to try to move past it but I can’t. It’s all I think about! All I do is cry, I feel so emotionally unstable. I have days where I feel like we can move past it and then the next it’s a 360 and I’m a mess.
He is trying absolutely his hardest to fix things so with that, it’s been difficult for me to just get up and leave. We have 2 young children too. We have a counselling session this week but I don’t think that will help long term. The trust is gone and I don’t think I can trust him again.
Ideally I want to move out , but for the short term, purely for the kids sakes and their stability I want to stay in our family home until I work out my next move. My ‘husband’ can stay at his friends but his fighting for the marriage is messing with my head. Beside the cheating, he is an awesome dad and what I thought husband and this has completely blindsided me. I’m so heart broken. Tell me this gets easier ?