YOU SAID:
I haven't gone to a party in a while.
INTO JAPANESE
しばらくパーティーに行っていない。
BACK INTO ENGLISH
I haven't been to a party in a while.
INTO JAPANESE
しばらくパーティーに行っていない。
BACK INTO ENGLISH
I haven't been to a party in a while.
That didn't even make that much sense in English.