Don't text her anymore. Wait until she calls on the phone to find out what is going on.
And then let her leave a message and call her back the next day.
Just say you've been really busy. And really be busy! Get yourself out so you have real things to say.
Also you can keep your cell shut off a lot so when she asks about not texting her back tell her that your phone was shut off.
I think the hardest thing for you will be when she gets upset with your not being at her beckon call anymore.
What you can say is:
Look, you wanted a divorce, not me. I was willing to work on the marriage. I don't have to call you back every five seconds like we're in a marriage. I have no hard feelings, I'm just busy with my own life now.
Then there will be a pause because her mouth will be hanging open. Then you can say, Listen I wish you all the best, but I've got to go. Be well. And then hang up. And be prepared to hear back from her in about four days.
