Omg what should i do about this girl?

Honestly, ive dealt with this kind of drama before and believe me, its not worth it! She is obviously insecure about her relationship with him and if hes letting her make this much drama, then just stop talking to both of them. If she tries to start a fight with you again, just ignore her. Especially if you havent seen this kid since 1st grade, just leave it alone. They both sound dumb