I have been there as well. My ex walked out of the counseling session and never returned. If there is a lasting love, maybe a tempory separation will help bring it to the forefront. I don't know, it didn't for me. After she left the counseling she never once asked to try to work it out again.
I got a place near the house so it was easy to be close to my children. We got joint custody with her as primary and within 6 months my oldest choose to come live with me. Later my youngest came to live with me when he turned the same age. I tried to keep everything as mellow as possible and always encouraged them to be close to their mother even though she was very hostile to me. I am very proud of both my children and am glad I stayed close so I could still be there for them as their dad.