Confused

So I j had sex with one of my closer friends and I don’t know how to tell him that I like him but I don’t want to just have a sexual relationship but also a dating relationship. How would I bring that about? And I’m not exactly sure if he even likes me back bc after we had sex he texted me and said, “Just bc we had sex doesn’t mean we’re a thing...okay?” He also didn’t exactly finish when we were having sex either...