I understand your frustration, but at least be thankful that she thought better of the divorce for now. I know it is extremely difficult, but you need to give her time to figure things out.
I am in a very similar situation and find it difficult taking my own advice. My wife left without any notice, moved most of the stuff out of the house, rented her own place, and filed for divorce. She is not willing to discuss anything and says that she will only consider counseling once the divorce is final. Doesn't seem to make sense to me, but I don't have a choice in the matter - FL (like most states) is a no-fault divorce state. As such, I cannot stop this no matter how hard I try.
All I can do is emphasize the advice others have given me. Work on yourself right now and make yourself happy - as no one is going to be interested in a broken person that is miserable. Once your spouse sees your improvements and happiness, they may be more inclined to return.
Feel free to PM me if you need someone to talk to.