I’m sorry, brother, you don’t. Give me one specific scripture that asserts that the church is the bride of Christ, some form of “and the church is the bride of Christ.” You can infer such a conclusion from some other uses of “bride,” but inference is not evidence. Not one passage directly equates the church as bride of Christ.
Here’s what I’ll give you, it’s up to you to decide for yourself. I believe the Church is Christ’s Bride.
Ephesians 5:24-27
2 Corinthians 11:2
Revelation 19:7-9