It requires a minimum of 18 years of age, and I am 16. However, with 18, I get 2300 calories (inactive) and 2550 (somewhat active). Due to walking around to all my classes and going up and down stairs all day long, I am likely somewhere in between those--say, 2400 calories. So if I change my diet to 2000 calories and add physical activity, I'd be burning more than a pound of fat a week, correct?
Yes, but if you still are wanting to do what you're doing in three months, you'll need to add more cardio, and thus more food. Not to mention, you are trying to bulk and cut at the same time, so your diet is going to have to be extremily specific. Like others have said, for the next three months, no junk food, no smoking, no alcohol, just complete and total commitment to your goal.
I'm sure it's possible, but it will take a lot of discipline.