No. Paul was not married. We know this from 1 Corinthians 7:7-8. In 1 Corinthians 7 Paul discusses several questions the church had about marriage and singleness. In that discussion he tells them, “I would that all men were even as I myself. I say therefore to the unmarried and widows, It is good for them if they abide even as I.” Paul is stating that he is single. Paul is not giving a command to never get married. Paul goes on in that chapter to teach that it is not wrong to get married, and if one is already married they should not leave their spouse. In other books Paul highly praises marriage and teaches some of the most wonderful truths about marriage. Paul is not giving a command that church leaders should remain single. In the book of 1 Timothy Paul teaches that pastors should be “the husband of one wife” and later Paul says teaching that forbids marriage is a “doctrine of devils”. Paul does not place any restriction against marriage for those who are church leaders. If anything, it seems preferable for the pastor to be married. Paul himself was single and recommended singleness as a great way to serve the Lord, but singleness is not required of anyone by the Bible.