she is not your girlfriend just someone u live with

from the sound of it .....little OCD combined with anti social behavior and depression (so odds bi polar with manic and depressive times)

as what to do .........your little boned since u are not a couple and only living as roommates u really have no power

odds are the lease is in both of your names ..........so having her removed is almost impossible with out a overt act (she really does stab u )

but u said the key words u do not feel safe living there ..........this is a excuse for u to get removed from the lease and leave the apartment with no penlites on u (the fact u do not feel safe there breaks the contract with the landlord and allows u to leave ) but u must record some of the issues that are making u want to leave (this is cover *** in court if landlord is **** and goes after u for remainder of the lease money from u if she defaults)