YOU SAID:

I sleep with my cat like I sleep with my girlfriend

INTO JAPANESE

私は私のガールフレンドと一緒に寝るような私の猫と一緒に寝る

BACK INTO ENGLISH

I sleep with my like sleeping with my girlfriend

INTO JAPANESE

私は私のガールフレンドと一緒に寝るような私と一緒に寝る

BACK INTO ENGLISH

I sleep with me like sleeping with my girlfriend

INTO JAPANESE

私は私のガールフレンドと一緒に寝るような私と一緒に寝る

BACK INTO ENGLISH

I sleep with me like sleeping with my girlfriend