YOU SAID:

My friend is really rude and I wish they wouldn't sit next to me

INTO JAPANESE

私の友達は本当に無礼なので、隣に座らないでほしい

BACK INTO ENGLISH

My friend is really rude, so please don't sit next to me

INTO JAPANESE

私の友達はとても失礼なので、私の隣に座らないでください

BACK INTO ENGLISH

My friend is so rude, please don't sit next to me

INTO JAPANESE

私の友達はとても失礼です、私の隣に座らないでください

BACK INTO ENGLISH

my friend is so rude please don't sit next to me

INTO JAPANESE

私の友達はとても無礼なので、私の隣に座らないでください

BACK INTO ENGLISH

My friend is very rude so please don't sit next to me

INTO JAPANESE

私の友達はとても無礼なので、私の隣に座らないでください

BACK INTO ENGLISH

My friend is very rude so please don't sit next to me