YOU SAID:

My best friend is dating my ex girlfriend and I'm going to kill myse;f.

INTO JAPANESE

私の親友は私の元のガールフレンドと付き合っていて、私はmyse;fを殺すつもりです。

BACK INTO ENGLISH

My best friend is going out with my ex-girlfriend and I'm going to kill myse;f.

INTO JAPANESE

私の親友は私の元のガールフレンドと付き合っていて、私はmyse;fを殺すつもりです。

BACK INTO ENGLISH

My best friend is going out with my ex-girlfriend and I'm going to kill myse;f.