I am in the Navys DEP, and im not feeling it anymore, how do i switch to the AF?

Write a letter to the Recruiting Command stating that you wish to be released from DEP. The recruiter will be angry and they will try and talk you out of it but you are within your rights. It can take up to six months to be released from DEP and the Navy can string it along since you want to join the Air Force. The Air Force will not be able to do anything until the Navy releases you from DEP. If you don't go to MEPS and ship to boot camp then you will also be released from DEP but the Air Force may not want to deal with you either if you go that route. You also need to make sure that you can get into the Air Force before you back out of the Navy.