Joining the AirForce question...?

Ok so I'm a male and my cousin I'd a female. I want to join the AirForce and she has expressed interest in it as well. We are both turning 18 this year (her on Thursday and I in early august). We want to join, but are a little frightened of the fact that we would be joining before all of our friends (since we have summer Bdays we graduated a year ahead of all of our friends). We know that male and femal are in separate lodging places (obviously) but we wonder if we signed up together if we would be in the flight. My mother said when she went I training male and female where separate(about 15 years ago), but in the movies they seem to be together. Did they change the rule of training together? We really wouldn't want to be separated in 2 separate flights.