I need help with my weight!!!!!?

I already asked this but didnt get a lot of answers. Im also using my older sisters account (with permissin).Im 12 5 feet 3 in. I weigh 156 lbs.WHat do I need to weigh. I need a lot of different fun excercises I cant really do sports cuz i live to far away from anything and i can deal with my eating habits almost :) i get really bored doing the same excercises i need to lose about 20 pounds in two - three months its disgusting plz help. Also this is totally of topic but are you obsessed with glee?