Does the nikaah terminate if the husband goes to live with a non Muslim?

Q: My question is with regards to my Nikah. My husband left me and our two children 8 months ago to live with a non muslim woman. He now regrets the decision he has made and wants to reconcile. Please advise if we are still in Nikah as I don't want to live in sin. He has not mentioned anything about giving me a Talaq at all when he was leaving, his words were he is leaving me as he does not have any feelings for
me.