How do I change jobs in the AF DEP??

I'm currently have a guaranteed job in Securtiy Forces however after talking to many airmen in the RAP I dont think this is the job for me. My recruiter says this is impossible but I kinda know how recruiters work and I do feel bad because I know its not an easy thing to do. I really don't want to be a pain in the *** and I love the air force! but this is my career and on top of serving my country I want to get the most out of my air force career as possible. My question is this, How do I play this game? who do I have to talk to? how do I get the "real" answers and not the recruiter answers? My recruiter says they are going to kick me out just for asking, I know they only want people who really want to be there, but I do! Could this happen? Im a highly qualified applicant do I have any options? HELP!