Are you married to an unbeliever? Perhaps you married and then were born again and your mate is not a believer? What does the Bible say about this?
I Corinthians 7 ... 12 But to the rest speak I, not the Lord: If any brother hath a wife that believeth not, and she be pleased to dwell with him, let him not put her away.
13 And the woman which hath an husband that believeth not, and if he be pleased to dwell with her, let her not leave him.
If the unbeliever is pleased to dwell with the believer is the key. If so, don't leave the unbeliever. Allow that unbeliever to dwell with you.
But if the unbeliever is not pleased to dwell with you, let the unbeliever leave ... don't try to stop the unbeliever from leaving.
15 But if the unbelieving depart, let him depart. A brother or a sister is not under bondage in such cases: but God hath called us to peace.