Sorry to hear about your troubles. Went though something similar. It ended amicably, but it was still difficult despite the tremendous relief I felt when we decided to split. He was a good guy...still is, but there were issues neither I, he or any therapist could repair (my opinion) and I felt bits of myself suffocating and dying everyday to accommodate him. I was in no way a doormat or a pushover, but I tried to be understanding and his issues are inflexible and selfish in nature.
I got through it following my gut, believing in myself and reveling in the lifting of heavy weights on my heart and mind. I stayed longer than it was healthy for my own psyche and health, but I know I tried. Today, I feel myself again and feel quite content and happy with my life. I've never been happier. I still worry about him a little and wish him a great life and hope that he finds someone great.
Anyways, I know you will get there. Be patient. You did the right thing. I believe in trying hard, but I also believe that separating in such situations is the right thing to do for yourself and your kids. Just believe in yourself and have confidence to regain and reclaim pieces of yourself. I personally don't believe in praying or any religion, but I do know that having confidence and hope in what we each find comfort, whether it be yourself, your chickens, friends, Gaia, Buddha, Allah, Jesus or whomever/whatever, helps in the path towards healing.