Strongr, what can you change? Not your W. You can only change you; your mind, your attitude, your goals.
Once you really grasp detachment, this will make more sense for you. Your marriage is over, she is moving on. What are YOU going to do to make the situation better? What will you do to spend as much time possible with your kids? What will you do to be the best you can be?
One day, she may come back. Maybe she won't. Work towards getting to a place so that you're fine with it either way. Women don't like what appears weak. Be strong. Be kind. Be calm.
Get rid of the word "try". It gives you an excuse to fail. You have the power within to do what you need. Grasp it. It's like a muscle, you have to work it to make it stronger.
One day at a time, my friend. Vent in here, portray a strong secure man out there. Read DR or DB again, and practice new actions. Focus on results, notice what doesn't work and stop doing it.