Can someone give me a clue? Is this salvageable?

I had hooked up with a coworker since I did feel a little attracted to him. We never actually had but we touched, caressed, and we would have dry . You know he would rub his private against mine. The thing is I've never been ual with or even kissed a guy. So maybe there is something wrong with me. Anyway back in November, I emailed him telling him that this FWB is over and that I would tell HR on him if he ever suggested hooking up. Since November, I've been ignoring him completely no hello nada. Since I was so mad and hurt. Last month he went out of the country, I was actually relieved that he was gone, but then he came back last week and I kept ignoring him until yesterday. Yesterday, I saw him in the kitchen and he said hello, you know like a mechanical/ break the ice hello and I smiled and said hello and that was it. I felt completely at ease. This morning, I ran into him and said hello and he didn't say anything. I emailed him saying that I was hoping we could be on speaking terms since yesterday I felt at ease with speaking to him. He ignored my email. He actually didn't bother to open it and looked at me like a freak. I personally confronted him and he was like fine. As the afternoon progressed, I did a lot of walking by ping his desk, but I didn't bother to talk to him since I was working. As I was walking back and he was leaving he gave me a somewhat dirty rude look. I personally thought that was rude and I sent him an email stating that I thought him looking at me funny was rude and that I was hurting these past few months and that I was hoping we could get along as coworkers. Is this salvageable? What should I do? Should I ignore him completely as before or say hi when I see him, but yet be at risk for him saying anything back or what?