Search Results: talking to an old friend

So this guy is a flatmate of one of my friends. I've seen him a couple of times, and our interactions always feel pretty charged. Like we will 'banter' but it doesn't flow as easily, but not in an 'we have nothing to say to each other' kinda way but almost as if we just don't want to transgress any boundaries. Thats what it feels like to me at least. We usually mock each other, and have a sort of frenemy 'friendship'.
Like, we accidentally saw each other in a bar and he came over and spoke to me the whole time until we both needed to leave.. (my guy friend said that based on our interaction he thought he was into me).
When we were in the cinema together (with group of friends) we sat next to each other and shared a popcorn, and he would like bat my hand away or our hands would touch etc.. but it wasn't obvious so I could be reading into stuff. Then we were talking about older men, and I joked about how all girls love an older guy.
Him: "how old are you?"
Me: I'm 21
Him: I'm 23.
Me: maybe if you have grey hairs I'd consider it.
Him: I've got plenty of them..
or when the movie screen went black before start:
Him : Are you nervous
Me (sarcastically): Yeah...
Him: First time?
I laughed
On the walk home we either had a very charged silence, or had mini arguments where one of us would deride the other. He walked with me pretty much the whole time. Or he like overtook me on the steps and was right in front of me, so I stepped on his shoe, and he then pretended to shove me down the stairs. He also then proceeded to make some sexual jokes. At the flat I put a pillow between us on the couch (in 'protest') and he was like 'stop being silly" and moved the pillow out the way and continued mocking me. Like I'm not sure if thats just him getting his angsty release or if he likes me?

Because I would think that he likes me, but he isn't adding me on anything fb/insta etc.. It might be because his flatmate could be weird about him getting with his friends? Idkkkk help