My ex wanted to be friends, now he doesn’t speak to me, why?

Anonymous
My ex and I dated for almost 4 years. We were very much in love. I was 17-21 and he was 20-24. I’m sure we both had our complaints about the relationship just as much as the positive, as we were both very young. I always believed we would just grow together. He was my first boyfriend. Instead of our relationship growing, as I was patiently waiting for, after a few years he told me he wanted a break for the whole summer instead. he completely ignored me. I was devastated. I’m leaving out a lot of the story. When we got back together I felt differently towards him for that. Few months passed and I told him I wanted a break. I started dating someone else without him knowing. They later found out and I chose the new man. I still am sorry for how it all went about, I just wanted to feel happy in a relationship. I stayed with the new guy for 3 years, and he was awful to me. My ex reached out to me once during that time but I didn’t respond. After 3 years, I reached out to my ex to apologize, again. I always felt so bad. He told me he wanted to be friends, and he was sorry too. He and I exchanged numbers again and he would message me. I was so happy as I don’t have any friends, I struggle with making friends. He invited me over rather quickly and we had a great conversation. I told him that I’m happy we can be friends. I felt after that day he kind of became distant from me which hurt. He told me I’m always welcome to come over though. I would always reach out and ask if he would like to do things with me but he never really seem interested. When he was first speaking to me, he seemed like he was very ready to be friends, now he doesn’t talk to me at all. Why?
My ex wanted to be friends, now he doesn’t speak to me, why?
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