Bro. even if you are in the process of divorce. There is a three year seperation before the papers are final.
During this time. Give some space for each other but REMEMBER to make your present felt. Dont disappear from her life. Else you make the mistake of giving her the impression that you have given up on the relationship. Make changes to your life where you think you have err. It is also good improvement to yourself. Go on and live your life but dont commit to another relationship unless you want to give up this one.
Call or SMS her time and again. A good day here and have a nice day there. It sound nice and caring. She may not agreed at first, just keep it up and be casual in the message. After a period of cooling off. Try to date her again. Should work. You have won her heart before. Do it agian bro. All the best.