I hate emotions

OK. So its been 6 months since I met this guy and I still can’t get him out of my head. We had a relationship for about a month. I was really into him and I thought he was really into me. However, after that time I found out I had chlamydia. (I was tested for everything right before him and was negative). He denied having anything. Of course I didn’t believe him and ended it. Months later I found out from a friend that he was telling people about what happened and talking trash about me. I left him an angry message telling him not to talk about me. He responded by telling me he never mentions me and that he got passed everything that happened. I didn’t beleive that either. A month after that I recieved the same kind of message from him. He warned me to stop telling people that he gave me an STD. I told him I only told a few close friends about the incident and sometimes I even doubt the test results. He said that he hoped so because he would love to see me again. At this point I apologized. I figured everything that happened was a miscommunication. I thought it was best just to be friends because I still had doubts about the STD. However, a couple of days later I changed my mind and told him maybe I would see him again. He then proceeds to tell me he actually had a girlfriend and its good that we are just friends. Now I recently found out that I have HPV. (I haven’t been with anyone since him). I know I should not even waste my time with this guy, considering most likely he gave me two STDs, but I can’t help it. Everytime I see him or talk to him I feel so happy. Is it just because I am so vulnerable? Is he just playing with my head? How am I supposed to move on?