Oh Kate,
I'm terribly sorry for you relationship ending like that. I have only just found this thread & by the sounds of things you are one classy lady who is clearly too good to be in a relationship with Craig. He doesn't deserve you and you deserve a whole lot better than him.
I commend you on making such an awful decision, but I think you made the 'right' one for you and your little man.
I wish you the best of luck!
Jayne xx