I'm trying to move out of my apartment, but my roommate won't sign me off the lease. What can I do?

First, if you are on the lease, your roommate CANNOT prevent you from having your boyfriend over. You have absolutely the same rights as your roommate. Unless your boyfriend is actually doing something illegal, calling the police would accomplish nothing.

Second, it doesn't matter whether your ROOMMATE "signs you off the lease." The LANDLORD has to agree to let you out of the lease. Of course, one way to get the landlord to do that is to get your roommate agree to sign a new lease making her responsible for 100 percent of the rent.

I'm licensed to practice law only in Indiana, and we've never met, so I can't give you "legal" advice. My answer is simply "friendly" advice based on my experience as an attorney in Indiana, my knowledge of federal and common law, and common sense. Even if you are in Indiana, employment law questions are very fact specific, and based on the limited information you provided in your post, I can't give you legal advice, and my answer is intended as general information only. It doesn't create an attorney-client relationship.