YOU SAID:
Hey I have not seen you in a long time
INTO JAPANESE
やあ、長い間会っていないよ
BACK INTO ENGLISH
hi i haven't seen you in a long time
INTO JAPANESE
こんにちは、長い間会っていません
BACK INTO ENGLISH
hello i haven't seen you in a long time
INTO JAPANESE
こんにちは、長い間会っていません
BACK INTO ENGLISH
hello i haven't seen you in a long time
That didn't even make that much sense in English.