I need a answer ASAP!!!!?

I signed up for the Navy on August 31 of 2009 and i am in the DEP program now and i am suppose to go to bootcamp August 9 of 2010 but lately I been having second thouguhts i just don't feel like its right anymore its not in my heart no more I want to go to college instead and do something i truly want to do. Well my question is can i still get out if I don't want to go and if i can how do i do, what do i need to do???