Based on this description, would you say I'm transgendered?

Transgender means, in most cases that you feel like you are the opposite sex. My best friend, a girl, constantly pretend to be a guy online, but she doesn't think she should have been male. She does sometimes wish she was because she thinks she'd enjoy it but she has no doubt she is a woman. If you don't feel like you are a chick, you aren't transgender.