Honestly, I'd probably just keep doing my usual thing, writing fanfics and such. I guess I would hang out with girls more. And maybe my fanfic writing would have more from the female perspective...which it does already except this time around it would probably be more genuine.
And I'd just keep studying to be a doctor at Swarthmore. My roommate would probably feel a little weird, though.
And I'd probably have to deal with fewer people thinking I'm gay for saying that a girl isn't very good looking.
