YOU SAID:
I would like to have fun with my girlfriend
INTO JAPANESE
私は私のガールフレンドと一緒に楽しみたいです。
BACK INTO ENGLISH
I want to enjoy with my girlfriend.
INTO JAPANESE
私は彼女と一緒に楽しみたいです。
BACK INTO ENGLISH
I want to have fun with her.
INTO JAPANESE
私は彼女と一緒にいたいです。
BACK INTO ENGLISH
I want to be with her.
INTO JAPANESE
...彼女といたい
BACK INTO ENGLISH
I want to be with her.
Okay, I get it, you like Translation Party.