Is what it is

Hi im 23 years old and living with herpes. I was dating a guy for about 7 months. I had my first break out 4 monthsinto our relationship. He made it seem like I cheated on him and I didnt get it from him. Well I did get from him and after we brok up I find from his ex that he has it for 4 years. I was so, like didnt even know what to do with myself. I was hurt by waht he did to me.This was a guy who I thought I was going to marry. He told me he wanted to marry me. He ended up cheating on me and that was why we broke up. the point is this guy is out there infecting people and not doing anything about it. He acts like its not a big deal at all. Im still dealing with and the fact that I have to tell a future partner what I have is a big deal. What r they going to think? are they still going to talk to me? are they going to think im all these things that Im not?? It hurts and Im soooo scared to meet someone and then have to tell them. any advice??