YOU SAID:

I have a crush on someone at school and my sister makes fun of me because of it.

INTO JAPANESE

私は学校で誰かに恋をしていて、妹はそれのために私をからかっています。

BACK INTO ENGLISH

I'm in love with someone at school and my sister is lying to me for it.

INTO JAPANESE

私は学校の誰かに恋をしていて、妹は私に嘘をついています。

BACK INTO ENGLISH

I'm in love with someone at school and my sister is lying to me.

INTO JAPANESE

私は学校で誰かと恋に落ちていて、妹は私に嘘をついています。

BACK INTO ENGLISH

I'm in love with someone at school and my sister is lying to me.