YOU SAID:

i need friends to have a party

INTO JAPANESE

私はパーティーを持つために友達が必要です

BACK INTO ENGLISH

I need a friend to have a party

INTO JAPANESE

パーティーをするには友達が必要です

BACK INTO ENGLISH

I need a friend to party

INTO JAPANESE

パーティーには友達が必要です

BACK INTO ENGLISH

I need a friend at the party

INTO JAPANESE

私はパーティーで友達が必要です

BACK INTO ENGLISH

I need a friend at the party