Is this bullying/harassment?

This guy at work whom I fooled around with sometime back, well we had fallen out as friends but were being civil at work, anyway his behaviour has been somewhat confusing to me.Today at work I was pushing the baskets along the floor (so I was bent over as I pushed them) and I pulled a silly face as I went past his till. 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 doesn't look away when I notice him.Sometimes he vey flirt 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.He seemed to lingeringing near me when I was on the phone the other day.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 padeliberatelyely 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 hadnt 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