2 Corinthians 11:2 For I am jealous over you with godly jealousy: for I have espoused you to one husband, that I may present you as a chaste virgin to Christ.
Paul here is not saying the church, the body of Christ, is the bride of Christ. Paul is using espousal to illustrate the faithfulness and purity of the church unto Christ Jesus.
The relationship the church has with Christ is expressed by marriage. Christ is the head of the church just as the husband is head of the wife (
Ephesians 5:23).
Paul is admonishing the church for following other apostles and another gospel (
2 Corinthians 11:4).
The bride of Christ is a city as seen by
Revelation 21:9-10.