YOU SAID:

i heard that some one has a crush on you

INTO JAPANESE

私は何人かがあなたに片思いしていると聞いた

BACK INTO ENGLISH

I heard that some of you had a crush on you.

INTO JAPANESE

何人かがあなたに片思いしていた人もいると聞きました。

BACK INTO ENGLISH

I've heard that some people had a crush on you.

INTO JAPANESE

何人かの人があなたに片思いしていたと聞いています。

BACK INTO ENGLISH

I've heard that some people had a crush on you.