YOU SAID:
i have a fat crush on this girl.
INTO JAPANESE
私はこの女の子に太った恋をしています。
BACK INTO ENGLISH
I have a fat love for this girl.
INTO JAPANESE
私はこの女の子が大好きです。
BACK INTO ENGLISH
I love this girl.
INTO JAPANESE
素敵な娘だ
BACK INTO ENGLISH
I love this girl.
That didn't even make that much sense in English.