my drive is...gone...

For the last few months my sexdrive just hasn't been there. I'm 21 and unemployed at the moment. I'm a junior in college. I have a wonderful fiancé who I love with all my heart. I haven't lost any desire or attraction for him but it's like my mind and body just haven't been communicating. I've read books, been researching, trying to look up other methods such as tantric sex. Has anyone else had this issue so young? Tips, advice, stories? Help please! I want to enjoy making love again.