YOU SAID:
hey how ya doin havn't seen you in a while!
INTO JAPANESE
ちょっとあなたがしばらくの間あなたを見ていないか
BACK INTO ENGLISH
Hey you haven't seen you for a while
INTO JAPANESE
ねえ、しばらく会ってないよ
BACK INTO ENGLISH
Hey, I have n’t seen you for a while
INTO JAPANESE
ねえ、私はしばらくあなたを見ていません
BACK INTO ENGLISH
Hey, I have n’t seen you for a while
That didn't even make that much sense in English.