Here the "bride" and "bridegroom" are metaphors. Jesus is like the "bridegroom" and John is like the friend of the "bridegroom." (See: [[rc://en/ta/man/jit/figs-metaphor]])
This can be stated in active form. Alternate translation: "So then I rejoice greatly" or "So I rejoice much" (See: [[rc://en/ta/man/jit/figs-activepassive]])