I can’t get him out my mind!!

I always saw this guy at work but never spoke to him until one day. We started talking and flirting, we exchange numbers and was talking everyday. We would see each other everyday at work!! Then we finally hooked up and we continue to talk and see each other everyday at work and outside of work.. then one day he switched up and it wasn’t the same!! March 28th 2020 was the last time we spoke!! Now that the stay at home order is letting up, he is able to come back to work, I’m nervous that I might accidentally run into him!! Or I’ll see him via cameras!! I still think about him and I’m trying not too. Its more than sex!! I mean sex was amazing with him.. he knows how to touch me!! We would speak for hours, he would hold me for hours!! After a few short months he changes!! How do I let that go!! I’ve been working on myself mentally physically and emotionally been going to therapy but I just can’t get him out my mind!! I’m stuck and I don’t wanna be. I wanna reach out to him but I don’t want that hurt and humiliation from not hearing back from!! In a way it’s like he wanted me to chase him towards the end when we finally stop speaking!!