YOU SAID:

I didn't matter to you, why would I matter to anyone else

INTO JAPANESE

私はあなたには関係ない、なぜ私は他の人に関係があるのだろう

BACK INTO ENGLISH

I have nothing to do with you, why do I relate to other people

INTO JAPANESE

私はあなたとは何の関係もありません、なぜ私は他の人々と関係があるのですか

BACK INTO ENGLISH

I have nothing to do with you, why do I have relationships with other people

INTO JAPANESE

私はあなたとは何の関係もありません、なぜ私は他の人々と関係を持っているのですか

BACK INTO ENGLISH

I have nothing to do with you, why do I have relationships with other people