The curious incident of the dog in the nigh-time Crossword puzzle

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Across
  1. 2. A major theme that the main character had to deal with due to it falling apart.
  2. 5. the dog that died
  3. 8. the main character's father
  4. 9. What The main character found in his father's closet
  5. 17. What The main character held for protection
  6. 19. The main character's friend/teacher
  7. 20. The main character
Down
  1. 1. What The main character has to tell to have honesty and trust between loved ones
  2. 3. The man who had an affair with the main character's mother
  3. 4. where The main character's mother lived
  4. 6. what Siobhan told the main character to write
  5. 7. What the main character had to take to achieve his dreams
  6. 10. The main character's pet
  7. 11. where The main character lived with his father
  8. 12. The main character's mother
  9. 13. A neurological and developmental disorder The main character struggles with
  10. 14. The main character's neighbor
  11. 15. What killed the dog
  12. 16. What The main character lost with his father
  13. 18. How the main character views/approaches most things