For a Christian, dating a non-Christian is not wise,
and marriage is not an option. Second Corinthians 6:14 tells us not to be “unequally yoked” with unbelievers. The picture given is that of two unequal oxen being plowed into the same yoke. Instead of lifting the load together, they act against each other. While this context does not specifically refer to marriage, it is certainly used above marriage. Further in the context it is said that the messiah’s dealings with Balial (Satan). In the marriage of a believer and an unbeliever there can be no spiritual attachment whatsoever. Paul is saying this to remind believers that they are the dwelling place of the Holy Spirit, who dwells in their hearts for salvation (2 Corinthians 6:15-17). Because of this,
The Bible says, “Do not be deceived: ‘Bad company corrupts good character'” (1 Corinthians 15:33). Any kind of close relationship with an unbeliever can quickly turn into something else that can cause a blockage in your life with Christ. We are called to evangelize the unsaved, not to build intimate relationships with them. There is nothing wrong with building good friendships with non-believers, but it should only be as long as it is reasonable for us. If you are dating an unbeliever for a relationship, what would honestly be your priority, romance or soul winning for Christ? If you are married to an unbeliever, Then how do both of you harvest spiritual intimacy in your married life? How can a good marriage be built and how can it be maintained if you disagree on the most important subject in the universe – the Lord Jesus Christ?