Is he after being friends again?

This guy at work whom I fooled around with sometime back, he didnt want a relatinship, and I was a virgin so he felt uncomfortable about going a he way, though he offered we didint just did othr stuff. well we had fallen out as friends I cut of the friendship because he was flaky and other things, but he acted like he didn't care, we were being civil at work.

The other day at work I was pushing the baskets along the floor (so I was bent over as I pushed them) After I'd pushed them he just was smiling and said "Amazing person" I was a little confused so I said "huh?" but he didn't say anything else.I have seen him staring at me quite intensely,he doesnt look away when I notice him.

Sometims he flirty with me (he is a flirty person in general) and will find excuses to touch me, where as other times he wont pay much attention to me at all, especially less since this new girl started he flirts/ hangs around her and talks to her alot, barely talks to me at all if she is there, yesterday after work I was ready to go so was he, but two other staff memebers hadnt finished, I left but he made a point to wait for the new girl (shes actually engaged though and im pretty sure he knows that, idk if he is just desperate)

There was a few other weird things he has done/said also

.-walked past me once and made some weird breathing noise/whispered something

.-blocked my way so I had to squeeze past/delibrately pushed into me-pretended to throw things at me

-very lightly punched me on the bare area of my back and my cheek

-when I was leaving once another staff member mentioned he hadn noticed me during the shift, and this guy said to him "Are you blind?"

-said he only wanted to see what wasinmy bag during bag check and didnt care about checking the bags- asked me how my holiday was i hadnt told him id been on

- when he walked past me and put his hands up and said my name,i smiled and walked past, then he pulled a sad face and said "awww no high five"

- Showed me this thing I'd been looking for 5 mins ago, and when I told him I no longer needed it he said "awww I feel so useless"

-Always tries to argue about anything/contradict any points I make

-Had this powder on his finger and touched my nose with it-Interupting my conversations with others/trying to join in

-Said that he should be allowed to refuse to serve certain people when he was serving me, and said "people like you

-Looked over when I was chatting to this guy from next door, and watched him as he left

- Today I ignored him unless I had to talk to him about work, he approached me when he could get away from the till, and when I was leaving I got served by the other girl at the till, I noticed him looking over while serving a customer and he made sure he said bye to me.

"Why is he acting this way? I just wish he'd be clear with me.