YOU SAID:
And you were worried she wouldn't fit in.
INTO JAPANESE
そして、あなたは彼女が合わないのではないかと心配していました.
BACK INTO ENGLISH
And you were worried that she wouldn't suit you.
INTO JAPANESE
そして、あなたは彼女があなたに似合わないのではないかと心配していました.
BACK INTO ENGLISH
And you were worried that she wouldn't suit you.
That didn't even make that much sense in English.