Speaking as someone who is a JD and is *not* practicing law, there are many, many alternative career options out there for JDs who don't care to practice.
Granted, its definitely "the road less travelled" but for me, it works. I apply my legal reasoning and research skills every day, I'm successful, and I'm happy as a clam.
I wholeheartedly agree with valkyrie and lauradav--you should do some serious soul-searching about WHY you want to go to law school and practice law. However, if you should find yourself in law school and feeling "trapped," its NOT the end of the world. There are ways for you to make your law school education work *for* you on *your own* terms.