"Missionary dating" often results in years of conflict and usually ends in broken hearts.
There is a special case where a person marries an unbeliever while himself/herself are, likewise, an unbeliever, and only later to become a believer.
Often Christians are in a church with an uneven number of single Christian guys and girls.They want to be in a relationship, or already like a non-Christian, and wonder if it’s wise to date them.But the answer isn’t yes, no, maybe or sometimes, the answer is, it’s the wrong question.( In these verses, the Apostle Paul compares believers with unbelievers in terms of light with darkness (verse 14), Christ with Belial (a references to Satan, verse 15), a believer with an unbeliever (verse 15), and a temple of God with a temple of idols (verse 16). Even though you may think you have a lot in common, the most important things you don't hold in common.
The Bible, especially the New Testament, warns Christians to avoid idolatry.
The real question should be ‘What kind of relationships do I want to build?