YOU SAID:

this person is my bestie, they are cool, i enjoy talking with my bestie

INTO JAPANESE

この人は私の親友です、彼らはかっこいいです、私は私の親友と話すのを楽しんでいます

BACK INTO ENGLISH

This person is my best friend, they are cool, I enjoy talking to my best friend

INTO JAPANESE

この人は私の親友です、彼らはかっこいいです、私は私の親友と話すのを楽しんでいます

BACK INTO ENGLISH

This person is my best friend, they are cool, I enjoy talking to my best friend