Tara,
I completely understand what you are saying.
I have two teenage girls. Sometimes they look at me like I am the dumbest person in the world. They think I know NOTHING and they know EVERYTHING.
A few weeks ago I had my first experience with the "I hate you, I am going to runaway" thing. It really broke my heart, but I didn't back down. I told her I would help her pack her things, but who was going to pay for cheerleading, take her to tumbling classes, do her hair for games. This really caught her attention.
With Courtney we do not have to much trouble with her taking her meds and stuff. She starts high school next year, and I hope that does not change.
Seana