Question: "What does the Bible say about a Christian staying single?"
Answer: The question of a Christian staying single and what the Bible says about believers never marrying is often misunderstood. Paul tells us in 1 Corinthians 7:7-8: "I wish that all men were as I am. But each man has his own gift from God; one has this gift, another has that. Now to the unmarried and the widows I say: It is good for them to stay unmarried, as I am." Notice that he says some have the gift of singleness and some the gift of marriage. Although it seems that nearly everyone marries, it is not necessarily God's will for everyone. Paul, for example, did not have to worry about the extra problems and stresses that come with marriage and/or family. He devoted his entire life to spreading the Word of God. He would not have been such a useful messenger if he had been married.
On the other hand, some people do better as a team, serving God as a couple and a family. Both kinds of people are equally important. It is not a sin to remain single, even for your entire life. The most important thing in life is not finding a mate and having children, but serving God. We should educate ourselves on the Word of God by reading our Bibles and praying. If we ask God to reveal Himself to us, He will respond (Matthew 7:7), and if we ask Him to use us to fulfill His good works, He will do that as well. "Do not conform any longer to the pattern of this world, but be transformed by the renewing of your mind. Then you will be able to test and approve what God's will is—his good, pleasing and perfect will" (Romans 12:2).
Singleness should not be viewed as a curse or an indication that there is "something wrong" with the single man or woman. While most people marry, and while the Bible seems to indicate that it is God's will for most people to marry, a single Christian is in no sense a "second class" Christian. As 1 Corinthians 7 indicates, singleness is, if anything, a higher calling. As with everything else in life, we should ask God for wisdom (James 1:5) concerning marriage. Following God's plan, whether that be marriage or singleness, will result in the productivity and joy that God desires for us.