YOU SAID:
I love my best friend so much i miss her when she's not here
INTO JAPANESE
私は私の親友をとても愛しているので、彼女がここにいないときは彼女がいなくて寂しいです
BACK INTO ENGLISH
I love my best friend so much that I miss her when she's not here
INTO JAPANESE
私は私の親友をとても愛しているので、彼女がここにいないときは彼女がいなくて寂しいです
BACK INTO ENGLISH
I love my best friend so much that I miss her when she's not here
That didn't even make that much sense in English.