YOU SAID:

i want to go back to when i was a kid just being with my cousin in the summer

INTO JAPANESE

私はちょうど夏に私のいとこと一緒にいた子供の頃に戻りたい

BACK INTO ENGLISH

I just want to go back to childhood when I was with my cousin in the summer

INTO JAPANESE

夏にいとこと一緒にいたとき、子供の頃に戻りたい

BACK INTO ENGLISH

When I was with my cousin in the summer, I want to go back to my childhood.

INTO JAPANESE

夏にいとこと一緒にいたとき、私は子供の頃に戻りたいと思っています。

BACK INTO ENGLISH

When I was with my cousin in the summer, I wanted to go back to my childhood.

INTO JAPANESE

夏にいとこと一緒にいたとき、私は子供の頃に戻りたいと思っていました。

BACK INTO ENGLISH

When I was with my cousin in the summer, I wanted to go back to my childhood.