As hard as it may seem filing is not the end. It is only filing.
And the WAH statement is not true. Do you know what the divorce law is in your state? Where I am there is a 120 day cooling off period for starters where nothing happens after filing. Plus the filing can be canceled or postponed. This is a long process and you can practice DB techniques. With kids and property issues this can take a long time.

He may have just wanted to lash out and take action. For some they want to do something, show you it is real. Is it real? Did you get a petiton or where served? Would it help if you moved home? Did he take you leaving as you were done? Does he see your family as interfering?

This is the 3rd time my H has moved out. The first in dec/jan 03/04 he was back in 6 weeks. The next in spring of 05, gone 10 weeks. This round harder, left May 1st 07, and wants to file. Never got this close before. I have seen my own therapist thru this and we have gone joint counseling and I just found out thru our insurance, he is back to the therapist he had alone, and we saw joint. I am telling you this as not all spouses who leave don't come back. Not wishing this move in, move out on anyone. Just saying that because they leave they won't come back. Mine was depressed, some MLC, unhappy etc. I have done all the don't and all the do's. On advice of my therapist we may file jointly pro se. Keep him away from a lawyer. Then we will have 4 months for him to hopefully reconsider and miss me. I am afraid, but nothing else to lose at this point. You have things you can do. Read DR and Hang in there this is really hard!