What is happening here

I have a guy friend that I dated about two years ago. We ended up not staying together and the breakup was really hard for me. We’ve recently reconnected about 4 years ago. He sort of stepped back into my life and we picked up where we left off, in a good way. He’s said that he doesn’t have feelings for me which is fine. But guys, he acts like I’m his entire world. He puts his arm around me when we’re out, won’t do something if it jeopardizes our time together, buys me everything ( I don’t ask for this and I never expect it, just what he does) tells me good morning every day. I mean seriously you’d think we were together. And people have asked us if we are. His best friend even thinks we’re together but he says we’re not. What is happening here??