This is a long one

I need help. I want to be with my kids father and I know he is terrible for me but I would like to have my family together. The problem is we got into a huge argument on cinco de mayo and I went and messaged his other kids mom. He wanted to keep his two families separate. Both of us has two daughters with him. He was with her for 10 years and back and forth between us for 7. But now she’s left him for good. The problem is he is really mad at me for blowing up his double life. What can I do to get him back and remedy this situation. Because he won’t even speak to me at this point.