Something I hope I never forget

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Across
  1. 2. Something very special and valued!
  2. 5. Dearly loved!
  3. 6. To protect something!
  4. 7. To hold something close and love it dearly!
Down
  1. 1. To keep something!
  2. 2. A serious promise!
  3. 3. Kept safe!
  4. 4. At all times, forever!