Why is he texting me after 3 months?

Last summer around this time, I began dating this guy. We met online but went to the same school. At first, I didn’t like him that much, but he grew onto me the more we spent time together, which was a lot. We had dates, sleepovers, worked out together and had many intimate moments. I met some of his family and vice versa. Some things went wrong in our relationship, with no one in particular to blame but not game changers either (to my knowledge). The biggest was that we wanted two different things. He didn’t want to be serious and I did. We were already doing serious things, so why not move in that direction?

We stopped talking after dating for a few months because he said didn’t want anything serious with me. He tried to talk to me once over the course of the next 6-9 months, and I reached out to him about three times. I wanted him to be in my life so badly, as someone more than just somebody I was dating. But he never budged. Each time I reached out, we would stop talking because he would be so distant with me and I couldn’t take it. He didn’t treat me the way he did when we first started dating. He asked me to be friends. He was so sweet and warm toward me before, and it was like he was kinda cold after. How could I be just friends with you when we were so intimate?

After the last time I contacted him and we argued, I told him that that if he didn’t want to be with me to not talk to me. And that I didn’t want to be his friend. He read my message and never responded.

Now, it’s 3 months later and he texts me at 3am. He doesn’t really say anything, only asks how I’m doing. And the last time we talked he was so so cold to me and he didn’t even acknowledge my messages. And I want to know why. Why is he texting me now? (Not a booty call; we live hours away from one another now)Though it’s been a year since this all began, I still found myself missing him and hoping one day he would want to be together (I am not waiting for him; I’ve dated others), but I feel like he plays with me and my emotions or he either does things without fully recognizing what he’s doing. What do you think?