Dear Sis,
I am not too sure when you grew up, but you did it so quickly. I remember being little girls and doing each other's hair and playing house. I can not count the number of times we have fought and annoyed each other, but I cannot remember them because they did not matter.
I just want you to know, you are my bestest friend. No one understands and knows me the way you do. You know so many secrets that no one else does, and for that, you are a very special person.
I have learned a great deal of stuff from you. For example, you are the coolest person I have ever met. You stand out in a crowd and you just be yourself all the time. I envy that about you. I love how people think I am your twin even though I am not and you are definitely prettier!
Thank you very much for being the best little sister though. Thank you for not only being forced to be my sister but offering to be my friend.
I know I have not been the best big sister over the years but, I did try my best. In all, you made me a big sister. I am forever grateful for that and you will never know how much I love you! I cannot wait to see where your future takes you and I cannot wait to be a big part of it.
Yours Truly,
Your Big Sis