How do I let go?

33F 39 M how do i let go? How do I let go? I know I shouldn’t be typing this. And I know I need to let go, but I’m most writing this to get some positive feedback and push to help me move on. About 3 years ago. I was lost. I didn’t know what I wanted in life. I ended going to a training for my job and ended up meeting someone. We hit it off and and talked the whole night. I ended seeing him and we slept together. From there, we talked everyday, and even though they lived across the country. When they would come here we’d see each other. And when I would go out there. They were going through separation with their SA and thinking back on it now, I was definitely a rebound. I think maybe subconsciously I knew but I couldn’t help it. i fell for them. As time went on, our relationship got more sexual and our conversation were very sex driven. So our conversations consisted of that. After a while, I started to not feel right about the situation and would ask them about it. They would always reassure me that I was in my head or overthinking. So I would try and let it go, we still talked but it was always me initiations convo. And my gut feeling still stayed. More and more I would try and talk and they would tell me I was in my head. To me it was more than sex. But they never told me that. The past couple of months, they have left my texts on read. Responding frequently but not always. Thoughts would race. Did I do something wrong? Is it because it was all about sex? Is it the way I look? And once again I was told to not over think. I got to the point where I couldn’t let it go. And so I had a more stern convo. This lead to me being left on read. I replied the next day and asked “are you really going to do me like this” They replied saying that everything that they are doing is not being done on purpose and that when they are home they just try to live in the moment. They said they don’t want me to think they don’t want to talk or hang with me. They just have a lot going on at home. Conversation was a bit normal then. I tried to be normal and have flirty convos. I was left on read. And still have recieved nothing. It just hurts. Because I’ve only asked for communication. I would be okay if they said “I’m just not interested.” Instead, I’m told I’m over thinking. I’m hurt. This was 3 years of growing attached and now I feel like I’ve been thrown away like nothing. Can anyone give me advice on how to cope? 33 F 39 M