My ex-wife and I are divorced, and I want to send her a text message to comfort her how to send it.

If divorce is your best solution, and two people are separated because of the same decision, then don't bother each other to find their own happiness. If your comfort is only out of your guilt for her, then you don't have to bother each other. Don't sprinkle salt on the wound. If you still love her, just follow your heart.