The person who has it hardest in this situation is the child, I wish you parents who don’t live together would put your children first and stop selfishly thinking about yourselves so much. You’ll have plenty of time to put yourselves first when your child is an adult. I say this as parent of one daughter, father left me when she was 9, we tried to make everything as easy as possible for her. I lived nearby, 9-5 job, took majority of responsibility for daughter, he had a much more demanding job, access arrangements were loosely she went to him for whole weekend every other weekend, with flexibility to see her any convenient time, ie if he was taking his new partners children out for a meal mid week, would often call me and pick daughter up too. Christmas, one year she stayed with me Christmas Eve, we had Christmas dinner Christmas Eve and pressies with me Christmas morning, Dad picked her up just before lunch, off to his for Christmas lunch and pressies with his new family. We didn’t disagree about anything in front of her, kept a good relationship up, which made it easy when she married her wonderful husband 10 years ago, we all sat on top table together etc etc.
Well I can assure you that broken relationships do have an effect on the child, when daughter moved into her own alone in her early 20s she said it was wonderful just putting a key in the front door and knowing that she would be sleeping and waking up in the same bed every night. I know the way she has worked hard with her own relationship, her and husband living together before marriage, waiting until financially secure to have children and lots of other things that come to light, that the last thing in the whole world she or her husband would want to do is see their children growing up with separated parents.
They have the sort of lovely, warm home that both their children’s friends gravitate to, are made to feel welcome, and they will often chat to my daughter. The ones from broken homes aren’t 100% happy, break down in relationships does often take its toll on the children, however much us parents congratulate ourselves on managing the situation so well. I’m also realistic in knowing that sadly, however hard we try sometimes relationships have to end, but please don’t imagine (like I did) that you have taken action without hurting your child.