Stupid man when he doesn't think about what he is doing. you probably can't not forget him in a few weeks. That needs time. Why crying... You still keeps him a bit in your heart I think. I suppose (?) he already new a while before 15 he would go away.
Be honest to eachother. It's good for all. So also good for you and your children.
Talk with people who you can trust about it.
Think about what must happen, lawyer, money, kids, where to live, how your life is changing, what are you going to do, who can help you, family, friends....
Whit help from other people it will be a little easier.
You need much time.( weeks,months, year ).
Henk.