YOU SAID:
I am insanely in love with you.
INTO JAPANESE
私はめちゃくちゃあなたに恋をしています。
BACK INTO ENGLISH
I'm madly in love with you
INTO JAPANESE
私はあなたに夢中です
BACK INTO ENGLISH
i'm crazy about you
INTO JAPANESE
私はあなたに夢中だ
BACK INTO ENGLISH
i'm crazy about you
That didn't even make that much sense in English.