I am 23, as well, and a guy, and #461 is right. The worst thing you can do is stay in vitctim mentality, and I can speak from personal experience regarding its addictive properties.
Put as much distance between you and your ex (I hope he is now your ex) as much as possible. You deserve nothing less than peace, love, safety, and security. You are not the dangerous one. Your only fault is continuing to have any relations with him out of a lack of respect for yourself. You are better than this.