Advice!! Anxiety caused by ex bf!!

So i have an ex bf who was abusive . physically emotionally and verbally. We went a year without talking after we broke up and lately when im walking down the street or even sitting in my driveway he stalks me always asks if we can talk asks for me back. My bf wants to kick his ass but womt because its not worth going to jail cause he cant protect me from jail. Anyways i dont know what to do. I dont know if i should get a restraining order or if i should just call the cops next time he shows up on my property. Cause he is homeless now ever since i kicked him out over a year ago. So there would be nowhere to serve the restraining order to. Someone please help i need advice!!! I keep getting anxiety and its hard to cope .