Letters - the challenge!

Mikey from The Psyche of Mikey has started a challenge that involves blog writing letters, I thought this was an interesting idea.  Here is the list of letters, I have already fallen over because there are some of these where I can't think of a person and some people who might get more than one letter.  BUT I'm going to give it a go:
Letter 1 — Your best friend
Letter 2 — Your crush
Letter 3 — Your parents
Letter 4 — Your sibling (or closest relative)
Letter 5 — Your dreams
Letter 6 — A stranger
Letter 7 — Your ex-boyfriend/girlfriend/love/crush
Letter 8 — Your favorite internet friend
Letter 9 — Someone you wish you could meet
Letter 10 — Someone you don’t talk to as much as you’d like to
Letter 11 — A deceased person you wish you could talk to
Letter 12 — The person you hate most/caused you a lot of pain
Letter 13 — Someone you wish could forgive you
Letter 14 — Someone you’ve drifted away from
Letter 15 — The person you miss the most
Letter 16 — Someone that’s not in your state/country
Letter 17 — Someone from your childhood
Letter 18 — The person that you wish you could be
Letter 19 — Someone that pesters your mind—good or bad
Letter 20 — The one that broke your heart the hardest
Letter 21 — Someone you judged by their first impression
Letter 22 — Someone you want to give a second chance to
Letter 23 — The last person you kissed
Letter 24 — The person that gave you your favorite memory
Letter 25 — The person you know that is going through the worst of times
Letter 26 — The last person you made a pinky promise to
Letter 27 — The friendliest person you knew for only one day
Letter 28 — Someone that changed your life
Letter 29 — The person that you want tell everything to, but too afraid to
Letter 30 — Your reflection in the mirror