1 Corinthians 7:36-37

However, if a man has decided to serve God as a single person, yet changes his mind and finds himself in love with a woman, although he never intended to marry, let him go ahead and marry her; it is not a sin to do so. On the other hand, if a man stands firm in his heart to remain single, and is under no compulsion to get married but has control over his passions and is determined to remain celibate, he has chosen well.