Long story, broken heart my a spineless woman?

Sorry, that you are going through this hard time. You have done your best and she is a cheat. Shift the focus, from her to yourself or your child. Concentrate on what you need to do to maintain a loving relationship during your access time. I found it helpful to read any of the Dalai Lama's books. It helped me to think on a different level and even replace the feeling of hate with compion. The feeling of hate actually keeps you focussed on the object of your hate. So change this. Remind yourself how much better off you are now. Stand proud and strong. Good luck.