Even couples who are engaged and claim to be Christian often live together before they marry and this too is sin because the Bible makes it perfectly clear that those who practice such things will absolutely not “inherit the kingdom of God” (1st Cor b).
The command to remain sexually pure is clear and knowing the temptation to commit fornication Paul says we are to “flee youthful passions and pursue righteousness, faith, love, and peace, along with those who call on the Lord from a pure heart” (2nd Tim ).
The Bible is clear that believers are not to date and most certainly, not marry someone who’s not a believer as the Apostle Paul makes clear, “Do not be unequally yoked with unbelievers.
For what partnership has righteousness with lawlessness?
They are just like everyone else.” Are you willing to destroy your fellowship by participating in sex outside of marriage?
The truth is we have no partnership with those who live in and walk in darkness.That means there shouldn’t even be a hint of a scandal in the church of God because it destroys the testimony of the believer and it also brings shamed to the cause of Christ.If unbelievers see so-called Christians living in sin, they will say “How are they any different from the world? Premarital sexual relationships are contrary to God's intent. Conjunction of spirits within God's divine oneness.