YOU SAID:

I love Sebastian. He is the greatest in the world. He should become my bestest friend and be a cold introvert with me.

INTO JAPANESE

私はSebastianが大好きです。彼は世界一です。彼は私の最愛の友人になり、私と一緒に冷たい内向的になるはずです。

BACK INTO ENGLISH

I love Sebastian. He is the best in the world. He will be my beloved friend and will be cold introverted with me.

INTO JAPANESE

私はSebastianが大好きです。彼は世界一です。彼は私の最愛の友人になり、私と一緒に寒い内向的になります。

BACK INTO ENGLISH

I love Sebastian. He is the best in the world. He will be my beloved friend and will be cold introverted with me.