I'd vote for getting a new phone number and a summer job and/or summer school wherever she's going to school, myself. Having had years where I avoided various cities for similar reasons, often if one can stay far enough away from the unstable man who was once in one's life, he will fixate on something else. *cough*

And why she thinks this isn't enough to get a restraining order, I don't know -- looking at the Cook County Clerk of the Court site about orders of protection, which is what the thing you'd want is called in Illinois, it sounds like this guy, particularly given his history, has more than done enough for her to get one.