If you believe that your husband is loving you and will love you till the end of life, then fight with him. Don’t ask him to give dialogues like both of you are important to him and god will decide etc etc..
If you don’t have belief on him, then better come out. He is not fit for your love on him. Use your education, knowledge stand on your legs and take care of your child (boy or girl)
Also understand his wish and desire. If his desire is to live with that girl, then leave him, By controlling him or threatening him love cannot be created. If love created on him, it will not real and not last.