Also, I wanted to say that when my son's father and I broke up, ten years ago now, I was terrified at the prospect of raising my child alone. As it happens, it worked out far better than I could have hoped. My son didn't have to grow up around an overbearing big kid who sulked if I paid more attention to our child than himself. My ex was occasionally physically abusive (though when I clouted him back hard he stopped... whether he would have stayed stopped or not I don't know.) When I think of the damage that could have been done by my ex and I staying together, I realise it was a good thing we broke up. The only thing I regret is that we didn't break up sooner.

What I mean is this, it may be terrifying thinking of the future now, but don't worry... it won't be as bad as constantly rowing in front of the kids. You can do this. You're a Mom, it's wired into your dna to cope. Honestly, you will be fine.