OP "I know I shouldn't wanna be with someone who doesn't whole heartedly want to be with me anyway but I love him and can't bring myself to imagine a life where he has another woman."
What do you love about him?
"His confidence has soared since we first met so I spose I knew this would happen one day,"
How your confidence gone down or up whil ebeing with him?
"I've not felt safe for and bout 3years. But now I'm not with him I feel even more unsafe"
I am so sorry you feel like this but I do hope this will be temporary, in that you will move on with your life.
"I can't make him come home. Even for the kids. He just resents this life he has even if he feels guilty about it. I'm going to tell him that this isn't acceptable and I won't wait around whilst he shags every new recruit."
Very wise.
Whats your history, you said
"When he was being horrible during my pregnancy there were goings on with a PT at the gym. Refused to stop going there. He swore blind that he hasn't cheated and I believed that he hadn't physically cheated at nd then she moved to Australia..."
"Says he knows that I could meet a new man and have someone else bring up his kids. He doesn't really do much of that anyway." So he doesn't do much with the kids and is happy for someone else to bring them up, quite the prince among men!
Yes, leaf I was ready to post that too. I was going to say I thought OP maybe a bit young to remember this song but here goes...
OP please write down what you love about him and why, and what you don't like and why. It might help you to see how things are and how they got where they are.
Don't forget to include the things you may have given up to enable him to change career or whatever.
Thinking of you. 