guy wont talk to me after we hooked up... why?

Okay so here’s when I met up with a guy from tinder for the first time:

It was nearly 2am and I was thinking about finally meeting up with this guy I’ve been talking to for a year that I met on Tinder. I was always too scared to meet up with him so I played games with him and never meeting up with him. Finally did spontaneously he came over and we hung out for a little bit.....

And we fucked like 4 times

During this entire time we were like doing some foreplay and kissing and **** like that and he was telling me things like this:
“Be mine”
“You’re my girlfriend”
“Are you mine?”

So, I was never expecting this to be a boyfriend/girlfriend thing. I thought we were just going to be friends who fucked or something idk hahaha. So he’s saying all of that cute **** which made me to start thinking about what’d it be like if I started seeing him.

The next days go by, and he doesn’t talk to me. We would text, but our conversations are very boring and stale. So I bluntly said to him:
“Do you not want to talk to me anymore?”
and he goes
“I’m just over thinking things”
And I say
“Be straight up with me”
He does
“I am”

I haven’t texted back since. It’s driving me crazy because I don’t know what the **** he means? He tells me, the night we hook up, that he wants me and makes it seem like I’m going to be his girlfriend. I assume this because he literally said that.

I haven’t talked to him since, and our conversation ended shitty, as you can see.

What are some reasons you guys won’t talk to you after you ****? What the **** does he mean? Why is he playing games? Should I stop talking to him? Help lol it’s frustrating he won’t just ******* say his feelings.