Verified answer

I guess you meant "You're my best friend" instead of "Your my best friend", right?

It's not a hundred, but it's a lot:

Du bist mein bester Freund (*German)

You're my best friend

Ju jeni miku im më të mirë

أنت أفضل صديق لي

Ты мой лепшы сябар

Вие сте най-добрият ми приятел

Ets el meu millor amic

妳是我最好的朋友

Ti si moj najbolji prijatelj

Jsi moje nejlepší kamarádka

Du er min bedste ven

Je bent mijn beste vriend

Sa oled mu parim sõber

Ikaw ang aking pinakamatalik na kaibigan

Tu es mon meilleur ami

Ti es o meu mellor amigo

Είσαι ο καλύτερος φίλος μου

אתה החבר הכי טוב שלי

तुम मेरे सबसे अच्छे दोस्त हो

Te vagy a legjobb barátom

Þú ert besti vinur minn

Kau sahabatku

Tá tú mo chara is fearr

Tu sei il mio migliore amico

あなたは私の親友だ

Ти си мојот најдобар пријател

넌 내 가장 친한 친구야

Du er min beste venn

Inti l-aqwa ħabib tiegħi

Kau sahabatku

شما بهترین دوست من

Você é meu melhor amigo

Tu esti prietenul meu cel mai bun

Ты мой лучший друг

Ти си мој најбољи пријатељ

Si moja najlepšia kamarátka

Ti si moj najboljši prijatelj

Eres mi mejor amigo

คุณ เป็น เพื่อน ที่ ดี ที่สุด ของ ฉัน

Ти мій найкращий друг

Bạn bè của tôi tốt nhất

Wyt ti'n fy ffrind gorau

איר'רע מיין בעסטער פריינד

Teie MU parim Matino

iyong ang Oma matalik na kaibigan

langankiertor paras ystäväni

There is 3 ways!

here is a link that shows you have to say in a few languages, and other phrases as well

http://www.howtosayin.com/your+my+best+friend.html

Best wishes

you are my best friend

Spanish - Tu eres mi mejor amiga

Chinese - 妳是我最好的朋友 nǐ​ shì​ wǒ​ zuì​ hǎo​ de​ péng you​

Start with English

You ARE my best friend (not "your" !!!)

Du bist mein bester Freund (German)

In English it's "you're my best friend".