Promising to God a sin?

My husband promised to God and raised his hands up to God that he wont ever marry me again, and that he wont marry me anymore. But he expects me to stay with him still for the kids. I think it is not okay for him to do that, but i feel like he really meant it for putting it in Gods name. Should i leave him since he already promised to God? Cause obviously he was serious about not marrying me anymore, unless he takes God as a joke.