I am in Air Force DEP? how long?and Why?

The AF is determining when you can fit into school...then you'll go to BMT about 10 weeks prior to that. Since there are a lot of maintenance jobs in the AF then there's a lot of people going to that/those schools. You should know something soon. Oh by the way, bug the crap out of the recruiter! That's her JOB!!! She should be doing her JOB, not being annoyed with you! Make her earn her pay!! She's already in the AF and has her future going...you're starting out on yours, so don't let anyone keep you from getting where you need to go!