Umm hey?

Hey I'm keeping most details about my age and name secret for now, I have really low confidence but I like to meet new people, even though I seem hesitant to start with. I have a boyfriend, we've been together for a few weeks and it seems to be going fine, but I have a minor fear of guys, like I get really scared and I have to fight against it to do as much as I can just to hug him. I always put on a brave face and hardly anyone notices I'm scared, but I'm getting use to being around him and he's really great. Thing is there's this guy I use to date, I mean it was long distance and I never actually met him but he keeps pestering me, threatening to kill everyone I date or get close to, I mean I know he can't do anything because he lives near London and I live near Birmingham, but the things he says to me to try and blackmail me into doing things over webcam or something, it really scares me. I've had a history with minor sexual harassment and even though police said they'll keep an eye on the person that did that to me in the past, I'm still scarred with the memory, minor or not. I know I should just push everything behind me and take my ex out of my life but no matter what I do he finds a way to contact me.