How can or will things get back to normal?

I had hooked up with a coworker since I did feel a little attracted to him. Supposedly he has a gf but I don't know. 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. A couple months ago, he went out of the country, I was actually relieved that he was gone, but then he came back and I kept ignoring him. One day, 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. The nexy 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. Then I told him to leave me alone since the situation was so messy and this morning I said hello, but he's still acting distant. How can or will things return to normal?