congrats! i can understand how you feel exactly.
i was switching between boy and girl mode, boy in class and girl outside school. i had intended to go full-time after my freshman year, but after i came out to some of my girl friends as a girl over halloween, i had positive responses and knew there was no way i would be wearing boy clothes again after that night. the following lecture i wore my wig and went to school as a girl, and never looked back. it was another two weeks before i started hrt though.