I actually don't know what to say to someone who says I would never leave my husband even if he was a serial killer except to say I suggest you ignore the self righteous brigade and make your decision with the help of your Father in Heaven and possibly your Bishop. If your husband is a risk to you or you children then as Gretchen said do what you need to do to be self. The Lord does not expect you to stay in a marriage where the your value or the value of your children is eroded. You have every right to tell your husband you don't trust him if it is an honest expression of your feelings which are valid. However, if you know your husband is getting in a car while drunk you have a legal and moral responsibility to call the police because his behavior is dangerous and how else does he learn about consequences. Remember he has his agency and you have yours! The most loving thing you can do for him is to stand up and let him know by word and actions that his behavior is no long acceptable to you and you are no longer prepared to tolerate living in such an environment. You can do all this and at the same time forgive him that is have no anger or resentment toward him. God bless you and I hope that whatever you choose it will lead you to peace in your life for you and your children.