I think I'm falling hard for him again

Today me and my best friend went shopping at Target so I could buy some journals and things to keep me organized. He was looking at a globe trying to find Japan so I went to go help him and as I was looking he started getting close to me and sniffing me and I moved and was like boy get off me.

So I took the globe and went on the next store aisle and he followed me and he tried to sniff me again and I put the folder I was holding between us and then we both started laughing. Then he walked away but I was determined to find Japan so I kept looking and there he goes again sniffing me and I playfully push him and tell him to stop and he said that's Karma because the last time we hung out we had sex and he smelled so good I just kept sniffing him because his smell was addictive. Once we find Japan we put the globe back and he's like let me see your glasses so I pull them off and hand them to him and I cover my face because I look ugly without my glasses while he walking around talking about how my glasses feel like drunk goggles. I tell him I want my glasses back and I hold my hand out and he grabs it and holds it and he's like let me put them off your face and he does and then he grabs my face and kisses me on my lips in public.

We say what we're doing is business only but he's starting to kiss me in public and he wouldn't before and the feelings I had for him 2 years ago are coming back because we do the things a couple do but were just friends and I feel like my feelings are hitting me hard really hard and I don't know what to do.