Did my situationship change his mind about me?

I started dating this guy 4 months ago, we went on dates and then after the first month, he said he wasn't ready for a relationship, so then we just became each other's late night bootycalls. We've been having sleepovers every weekend since, and it's usually just a 12-2am text, super easy. I did ask him a few more times if he wanted to be dating and he kept saying the same thing that he's not ready for a relationship, so i stopped asking. I saw him last Friday night and he looked at my phone when another guy hit me up and he got kinda mad... he saw it and randomly said "i really like you and I'm not ready for a relationship, but I want to keep seeing you i just don't know what to do I'm confused" and i was like "relax..." trying to keep it casual.

I was honestly thinking about ending our little late night romance thing... until last night he texted me asking if i wanted to get dinner and drinks... which is not something we do. We also don't do weekdays. So I went and we had a good time and I spent the night and left this morning. I told him I am going to Miami this weekend to visit friends... that kind of upset him. Is it possible he's starting to catch feelings? Or is it still just casual. Is he starting to get jealous? Is it even possible to date someone after only being a bootycall for months?

Did my situationship change his mind about me?
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