Marry me?

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Across
  1. 1. All aboard
  2. 4. What other people became after we met
  3. 5. Other lyric to all songs
  4. 6. Lyric to all songs
Down
  1. 2. Buzzing workspace
  2. 3. Most important thing for you to pass onto our kids
  3. 5. Wedding suit colour
  4. 6. I love you with all my ____.