so sorry to read this sofacat. I dont have any exp.with dealing with a parents addiction, but I do know that sadly these drugs strike everyone and your not alone. I see others chimed in to support you with dealing with a parent and hope you find the strength to get through this.
I hope and pray you find peace and comfort and do the right thing, its just completely sucks to read this!
chin up ,stay strong,one day at a time and huge hug to ya !