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