Yamato x Reader // Say "I Love You"

This is a story of you the reader! falling in love with Yamato!!
You are Y/N Tachibana the younger sister of Mei Tachibana! You are also one year younger then Mei. You two and hang out with each other most of the day when you don't have class!
Yeah sorry for this but your gonna have long hair! Sorry third has to fit in with my story line!! Anyway you are a bit shorter then Mei with long flowing hair.(Mei has short hair while you have long hair sorry if you don't just go along with it).
Even tho you are quiet all the time when you get riled up you can't help but resort to violence surprisingly without a single word (especially if they mess with Mei).
You two have always been there for each other so you project each other.