Am I just hurting or angry ???? Help 10pts?

I'm 23 and been seeing a 40 year old man. We been talking for a year now. During the past few months I been trying to get him to commit to me. We been out on only 1 date and I feel like I kinda forced him into that. When we went out we argued the whole time. He never takes me out. When he comes over its we always have sex and that's it. To the point where my mom even said that I was his side piece. We argue all the time about everything . Mostly about us and where this is going. He has disrespected me in an argument we had where he hit below the belt. He claims he loves me and doesn't want me to leave but he treats me like **** and I don't know why I stay. What I'm mostly hurt about is I just found out I caught a std (trich) from him . He told me he wasn't seeing anyone else but lied. He had females calling his phone in the morning when he stayed at my house and we argues about that. He finally told me he was messing with 2 other females but claimed we wasn't talking around that time which was bullshit. He stands me up all the time when he says he's gonna come see me. Just everything is bad. But I'm crying more and more lately about this . I'm constantly thinking how cld he do this to me. I'm angry very angry and have a lot build up inside me. I'm don't know what to do. He won't leave me alone he says. I feel so lost like I'm about to loose it. But he says everything will be okay. Why can't I just find it in me to move on ??!! I feel so depressed. Advice please ??