I(25, female) was seeing a colleague(24, male) from a different department for around two months. We had feelings for each other but the feelings were never strong enough to make us step things up. And we were constantly fighting a month after we started dating, so when I found out he was talking to another girl I ended it. And I only learned that he was sleeping with his roommate's friend when we both agreed this would be exclusive. We stopped talking for a month, but eventually drunk hookup once. After the hookup we agreed to remain fwb, but he regretted it afterwards cause he's afraid things would turn ugly again. This time I deleted him on social media called him names, which I regretted a lot. Nothing else happened afterwards...Until I was transferred to a different department and now we are in the same floor.
At first I tried to ignore him, but he texted me "Hi, new friend" and we started talking again cause I wanted to find out what he wanted from me. He was just chatting like he did when we first met, but sometimes he would make sexual jokes and made me feel like he wanted to hookup. After three days, when we were smoking on the balcony together, I finally asked him "Why would you want to talk to me again after I called you names?" He shrugged and said he wouldn't remember those trivial things, and that he just wanted to chat with me like we used to. I replied I appreciate this and was happy things weren't awkward between us.
But weirdly, after this short talking, he basically stopped talking to me completely. He wouldn't text me and wouldn't ask me to smoke together anymore. And if I initiated a conversation, he would maybe reply one or two times but then leave me on read. I don't know what happened. If this is what he wants, then so be it. But it still hurts. I really have no idea what's happening at this moment. I still want to remain friends, and maybe deep down I still want more. Can anyone please tell me what I can do to make things less awkward between us? Any advice would be much appreciated.