Keep a log if he does anything at all, and get a restraining order. By anything I mean comments, tormenting looks, posts on social media referencing you or any other behaviour thay with the right description you can argue is threatening. Of course I can't say this with certainty, but my betting is that he'll leave you alone. Ofcourse people like this re offend, but with a family in close vicinity of you I don't think he'd take the risk of hurting you agaiN specifically. People who commit this crimes ate usually clever in the way they commit them, that's why it's a punishless crime, but it's far from a victimless one and I'm sorry you have to have the experience of knowing he is near by. I am potentially facing my last two years of medical school with my perpetrator and the thought fills me with drea, but there is enough consequences of this already, and I refuse to let it ruin my life further. Damage limitation is all you can do now including seeking the appropriate professional support to deal with the complex emotions that having him near by may throw up.