YOU SAID:

I go to the party and see my friends but then everybody gets lost and we can't find each other.

INTO JAPANESE

パーティーに行って友達に会いましたが、みんなが道に迷ってしまい、お互いを見つけることができません。

BACK INTO ENGLISH

You go to a party and meet your friends, but everyone gets lost and can't find each other.

INTO JAPANESE

パーティーに行って友達に会いましたが、みんな道に迷ってしまい見つかりません。

BACK INTO ENGLISH

I went to a party and met some friends, but they all got lost and I couldn't find them.

INTO JAPANESE

パーティーに行って友達何人かに会ったのですが、みんな道に迷ってしまい、見つかりませんでした。

BACK INTO ENGLISH

I went to a party and met some friends, but they all got lost and I couldn't find them.