Advise please.

My fiance started going out a lot and lying to me that he didn't. He doesn't call me anymore. Goes days without having contact with me. We were great and out of nowhere he started changing. Right now I called him and caught him at a party. He played the victim card and ended up calling everything off with me. He said he wants to give us a time and that he'll let me know in the future if he wants to get back with me.

I'm stuck in a toxic relationship cycle with him. I keep having dreams that he is cheating on me. We have a daughter togethor. For her I want to get the courage to leave but I don't know how to. I don't want her to grow up in a broken home or toxic home.

I want to leave this cycle....