YOU SAID:

I want to be in a relationship with Tertia but she's my buddy's ex.

INTO JAPANESE

私はテルティアとの関係になりたいのですが、彼女は私の相棒の元です。

BACK INTO ENGLISH

I want to have a relationship with Teltia, but she is my companion.

INTO JAPANESE

私はテルティアと関係を持ちたいのですが、彼女は私の仲間です。

BACK INTO ENGLISH

I want to have a relationship with Teltia, she is my companion.

INTO JAPANESE

私はテルティアとの関係を持ちたいです、彼女は私の仲間です。

BACK INTO ENGLISH

I want to have a relationship with Teltia, she is my companion.