Wait, You're A Girl!?

Note: I've seen a lot of these "oh, your friend is actually the opposite sex" scenarios, and I wanted to try it myself, but try to make it not so obvious. Like, some of these are just plain easy to figure out if you have a set of eyes. Also, the main character (you) is stupid, so keep that in mind. You've been best friends with Charlie for seven years. You've practically grown up together, shared countless adventures, and spent more time together than either of you would care to admit. There's just one tiny problem. Charlie isn't exactly who you thought she was. With her short, choppy red hair, boyish clothes, deeper voice, and rather masculine appearance, it's easy to see how someone might get confused. But seven years? Seriously? You're not exactly known for being the sharpest tool in the shed, and your terrible eyesight certainly doesn't help. Still, you'd think you'd have figured out something this important by now. Well, Charlie has finally decided it's time for you to learn the truth.