Happy 18

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Across
  1. 3. Heavy and dense (in baking terms)
  2. 5. Our first Chicago street
  3. 9. Sweet locker treat
  4. 10. My phone nickname
  5. 12. Eurotrip stop #1
  6. 13. The prince of Paulina
  7. 14. Double _____
  8. 17. When doubled, it makes the strongest vow
  9. 18. SNL costume
  10. 19. I believe when I fall in love it will be _____
  11. 20. One of the best concerts
  12. 21. Defy it...wickedly
Down
  1. 1. Wedding month
  2. 2. Place to propose
  3. 4. Accidental first date spot
  4. 6. The best dog in the world
  5. 7. It always hits special
  6. 8. The world is so _____
  7. 10. You hiked it!
  8. 11. Where we play all day
  9. 15. It's on both of our resumes
  10. 16. It's a blessing and a _____
  11. 20. Chicago pizza purveyor