Am i crazy?!

Today i found out that my husband is still talking to the girls family who he had an emotional affair with. I saw the girls sister on his Instagram msg, i just lost it. He keeps saying its nothing but i packed my things i left the house and am staying with my mom. When i ask him to see the msg, he said No. i asked him why he feels the need to keep communicating with them, he says he only talks to the girls sister and not her??? And says she is in a relationship…. I dont give a flying fuck if she was now married with 10 kids, he should not be speaking to that family anymore. I told him we are done and will bring the divorce papers to him. He says he promised the sister he will photograph their wedding, guys, these people live in a different country. So he wants to fly to their country to photograph the sisters wedding? What the fuck???he keeps saying im crazy for leaving because he is just talking to them and that i can never control him and tell him who he can and cannot talk to. I specifically asked him when he wanted back into my life that anything associated with that woman i dont want in my life and he promised that he made a mistake and he wants me and is done with her. Just to turn around and tell me he doesnt talk to her but he talks to her family. This man told me he was in love with this woman at some point, i went through hell you guys. Ive never felt so betrayed. I was in so much pain i thought i was gonna have a heart attack. How is any of this okay? He says he is with me and i shouldnt worry about that family anymore. I just think if he remotely cared he would never put me through any of this.