You are a fighter! You have determination and that will see you thru a lot of the obstacles along the way. Cry if you feel the need to cry. Crying is a way of helping you to heal. Don't ever be ashamed of doing so. Yes, they really do make some awful choices, but how else will they learn and grow up. How else will they come to realize that what they were searching for all along was right there in front of them?
You have come a long way in a very short period of time. You will get thru this and become stronger and more independent as each day passes. I have faith in you. I, too, hope he comes thru his crisis a better man and comes to realize what a wonderful wife and family he left behind.
Please take care of yourself.
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.