During the Proposal Ceremony, I Changed from the Protagonist to the Audience

I have loved her for 7 years. On the anniversary day, I carefully arranged the proposal scene and planned to give Lin Xu a surprise. Unexpectedly, when I arrived, I heard her say "I do." But the hero of the proposal was not me. She actually reunited with the sweetheart who abandoned her during the most difficult time, and I became an audience member on the spot. I was about to move and saw the video she took with that man a month ago. In this case, I will leave. But after I decided to let go, she knelt down in front of me like crazy and begged me for forgiveness.