YOU SAID:

I went to the shops and met a friend that I haven't seen in a long time

INTO JAPANESE

お店に行って、久しぶりに会った友達に会った

BACK INTO ENGLISH

I went to the store and met a friend I met after a long time

INTO JAPANESE

お店に行って久々に会った友達に会った

BACK INTO ENGLISH

I went to the store and met a friend I met after a long time