YOU SAID:

Cause I was going down but I was doing it whit you

INTO JAPANESE

私は落ち込んでいたが、私はあなたと一緒にそれをやっていた原因

BACK INTO ENGLISH

I was depressed cause I was doing it with you

INTO JAPANESE

私はあなたと一緒にやっていたので落ち込んでいた

BACK INTO ENGLISH

I was depressed because I was doing it with you

INTO JAPANESE

キミとやってたから落ち込んでた

BACK INTO ENGLISH

I was depressed because I was doing it with you