You cannot just move out. Your signed lease is a binding contract.
For help mediating roommate issues, contact the SF Counseling Center in S-254 or online at www.sfcollege.edu/counseling. Or for UF students contact Student Conduct and Conflict Resolution for free mediation services. www.dso.ufl.edu/sccr/resolution.
Find out from management if your lease has an option of transfer.
If there is no transfer option you may have to tough it out and do the best you can to act maturely in the situation.
If your lease allows subleasing, you could choose to find someone to sublease your apartment.