Dear Mrs. Weasley,
It has been very hard to write this letter, as I am terrible with words. However, I got some help over the telephone from Hermione, and she helped me. I don't think I've ever really thanked you enough for letting me stay over all those summers, and sending me Christmas presents all those years. I really, really appreciate it. You've been a wonderful help to me since the day I met you, when you told me how to get through the barrier to platform nine and three-quarters. You realized instantly that I needed help, and have continued to help me throughout the years I've known you. When you hugged me last year, I realized that you have become the mother I barely ever had, and for that I cannot thank you enough. You and Mr. Weasley and everyone else make up my favorite family in the world, and I love you all.
I don't really know what possessed me to write this, I guess just a strong need for love and protection right now, what with You-Know-Who back in power. I hope I can come over to stay soon, so I can see you all. I feel really good every time I see you Mrs. Weasley, because I automatically feel like I don't need to worry or be brave or anything because you're there to help me. I need a mother, so I'm very glad I have you.
This is pretty much just a short, random thank you for everything you've done for me. As you can probably tell, Hermione helped a lot, but all she really did was help me with the wording, and help me say the things I wanted to. This is all from my heart, and I hope you understand how much I love you, and how much you mean to me. (You guessed it, Hermione wording) Anyway, hope to see you soon.
Love,
Harry