Ex FB confusion

So after 4 years, my ex boyfriend friend reauested me in FB. I accepted and we did some catching up. Sooner than I realized it, we were talking about sex. He let me know how sorry he was gor how things turned out. he saud he missed me and was happy to b back in my life. He wasnt sure where this sas going, but he liked the feeling. We texted non stop about how horny he was. Don’t get me wrong, we did talk about everyday things, but the convo always shifted. We agreed to meet up and ended up having sex. Afterwards, we would talk just about everyday… We had over 3k messages in a matter of a week. I kind of knew he was in to me since he would make little posts on FB. We had sex a few more times. Soon after, his texts were no as frequent. I actually wanted to see how long he would go and not say anything…..A WHOLE WEEK PASSED. I text him everything seemed okay. I would ask to hang out but he always made up an excuse. Even when he wasn’t doing anything, something would conveniently come up. I asked what that was about. All he could say was he didn’t know. He then told me we should chill on the sex b/c things were getting complicated. He said maybe then I could have my time to hang out. SO IT’S EITHER SEX AND NO HANGING OUT OR NO SEX AND THE POSSIBLITY TO HANG OUT!!!! Am I confused or is he?
After that we still had sex a few more times until he told me he didn’t want to anymore. We didn’t though just last week. I asked if there was something I did to make him do standoffish. He said no. I told him I wanted to see him a d he was busy. He said he isn’t seeing anyone, which he isn’t.
Why am I being played to the left? Does he care? I freaking love this guy. I just feel all he wanted was sex. He says that wasn’t the case. But I’m just confused by his contradictory words and actions. How do I get him to take a second look? How can I get my first back?