Hi Angel
Your parents love you and want the best for you. Like the Watchtower, they are simply using repetition in the hope that you will grow to doubt your doubts.Feel sorry for them, do all the research you want into the organization but i recommend keeping your doubts and disagreements to yourself. I know it is and will continue to be hard. I think it wise not to try reverse witnessing strategies on them to get them to change. "OK let me think about that" could be a common phrase in your vocabulary to ward off further discussion.
What you especially don't want is for your Mom to become frantic about your listening to satan and call in the elders to give you spiritual counseling which may lead to disfellowship.
Hang in there Gal and stay connected with this forum.
God bless