YOU SAID:

i forgot who that was but he never came back

INTO JAPANESE

誰を忘れてしまったが、彼は戻ってきたこと

BACK INTO ENGLISH

I forgot who, but he came back to

INTO JAPANESE

人を忘れてしまったが、彼に帰った

BACK INTO ENGLISH

I forgot who, but he went

INTO JAPANESE

人を忘れてしまったが、彼は行った

BACK INTO ENGLISH

I forgot who, but he went