Thing is I now know that it will happen again as it's not the first time, he just can't help it. Yes.
Meanwhile I'm becoming a shadow of the woman I once was, constantly thinking who is he talking to/texting. When I'm not with him, who is he meeting? It is eating away at the very core of who I am and I can no longer cope with it. It's so destructive and soul destroying. The trust is shattered into a million pieces This will be your life forever if you stay - you know that.
He just won't accept it though What?! He doesn't get that choice. That simply isn't a logical sentence - he doesn't have to accept it, he can stand there not accepting it until he's blue in the face and you can - and should - still simply go ahead and make the life choices HIS behaviour has caused. Tough shit.
You gave birth six weeks ago. You need peace, tranquility and support. The most important thing right now is healing from the birth, adjusting to having your DS, and doing things like resting, establishing feeding, and ensuring that you are supported enough so that you don't develop PND.
Are your family supportive? Could you go and stay with them? Honestly, in terms of a split, leaving right now would be easier in a LOT of ways as there is no question that your baby should stay with you and that will be the status quo.
If I were you I would leave now, become officially separated and take as much help as you can with relocating local to your family (IF they are supportive). Do not stay any longer up north and become established there with your baby - move to where YOU want to be, and start all the baby group, making local friends with babies stuff there - where you are likely to stay.
It may sound impossible with a newborn but in truth it's much easier in many ways- it's actually harder when they are older and mobile!
Do not engage with your cheater liar H - there's no point. You know already what his speeches will say - you detail it all upthread and it's all lies lies lies. He will have been sleeping with other people through your relationship and deep down you know it.
Yes you can move with the baby and there is nothing he can do. You can tell him you are leaving him for his cheating, you need physical support from your family with the newborn and that is that.
He can come and visit when he can fit it in to his extracurricular shag schedule
I'm very sorry but very glad you are clear that this is a dead end and you need to get out.