What do I do?

My fiancé and I have been having some issues. We are currently going through a custody battle for his little one. The stress has pushed us apart. I’ve been trying to tell him how I feel for a while and it’s not getting through to him. He is still rude and takes out his anger on me. Last night, I said if it was going to be like this forever, I didn’t want to be together anymore. And his response was “shut the hell up, you say that all the time”. I cannot take it anymore. I don’t know what to do. I deserve so much more. I’ve invested so much into this relationship. I’ve gained a daughter, I’ve fought through infertility, made a home, all with this man. Please give me advice.