whats up with me

Saturday my 17 year old called my dad crying saying she was ready to come home.She was miserable with the boyfriend.So my parents drive 8 hours to get her,spent 250 dollars on gas food and a hotel..Get up Sunday morning to come back home,the boyfriend calls my dads cell phone.My dad told him to quit calling and my daughter threatened to jump out of the car..Anyway they came back to La..and she didnt want to be here.she was being mean and throwing her fit.she left and went with her nanny then came back home..Long story short---she is going back to him this morning by herself on a bus.She just wont listen to us.