I wish everyone could get along without marrying, just as I do. But we are not all the same. God gives some the gift of a husband or wife, and others He gives the gift of being able to stay happily unmarried. So I say to those who aren’t married and to widows, better to stay unmarried if you can, just as I am.
I Corinthians 7:7-8 (TLB)

If you have a wife, do not seek to end the marriage. If you do not have a wife, do not seek to get married. But if you do get married, it is not a sin. And if a young woman gets married, it is not a sin. However, those who get married at this time will have troubles, and I am trying to spare you those problems.
I Corinthians 7:27-28 (NLT)

Don’t team up with those who are unbelievers. How can righteousness be a partner with wickedness? How can light live with darkness?
II Corinthians 6:14 (NLT)

But because there is so much sexual immorality, each man should have his own wife, and each woman should have her own husband.
I Corinthians 7:2 (NLT)