How do I get over the Jealousy, after a breakup?

Tough situation, but if you know you're not good for him, you have to somehow conquer your feelings of love and put him out of your life and move on. One thing you can do is stop tracking him so closely that you know what women he's with -- that just feeds your jealousy. Concentrate on raising your children and finding new people to build your life around, and let him go. Sorry I don't have more practical advice for you. Good luck to you and the children.