I Am Getting a Divorce

So it has now been almost 7 months since he left. He had done nothing to start the process in regards to divorce.
But just last weekend proposed to the woman he left me for. They have already set a date of August of next year. How he believes he will have his divorce by then is beyond me.
Her children have become more important to him. Its sad to see my children stuggle with the crappy decisions he continues to make.
I don't know the person he is nor do I ever want to. Our contact has ceased as he has called me every name in the book.