In highschool i dated this asshole Ben for under a year. He cheated on me over ten times with his ex Erin, he got her pregnant multiple times, he got in trouble and had to go to court when I dated him, he took drugs including pcp when I dated him, he'd brag about getting piss drunk and cheat on me at parties and then his ex would try to play stupid to my face. So when I tried to break up with him he got violent, he broke shit, fucked up my door, put a hole in my wall, pulled a knife out on my dad and said fuck you to my mom and then I fucking said I'm leaving you and he called me over a hundred times, threatened to kill me at school, prank phone called my dad and told me he was going to kill himself. I got a restraining order and under a year later he violated it and then he freaking got pissed off and had his friend peter threatening to kill me on facebook. My fence also got spraypainted and i found out from his ex girlfriends brother that he slashed a teachers son's tires out of anger. He also felt up his exes supposedly best friend nicole in front of me. So am i over reacting if i feel the need to get a gun? What should i do to get rid of him? How do i protect myself if im 20 years old and barely 96 lbs and 5 foot 4? How do i get rid of him?