YOU SAID:
I want to spend forever with you.
INTO JAPANESE
私はあなたと永遠に過ごしたいです。
BACK INTO ENGLISH
I want you and spend forever.
INTO JAPANESE
私はあなたし、永遠に過ごします。
BACK INTO ENGLISH
I you and spend forever.
INTO JAPANESE
私あなたと永遠に過ごします。
BACK INTO ENGLISH
I spend forever with you.
INTO JAPANESE
私はあなたと永遠に過ごします。
BACK INTO ENGLISH
I spend forever with you.
That didn't even make that much sense in English.