离 (lí) = to leave/without
开 (kāi) = to open/to start
离开 (líkāi) = to leave/to depart
We also learned 离 before as "from" when talking about distance
you are my favorite person on this app, thanks for always breaking examples down
Would it also be correct to say 别从我分开？
Here, your sentence is used in dating or relationship situations, where separation of more than a person takes place. Yet, this sentence is correct in terms of meaning.