What Should I Say to Him?

So theres this guy at work that I think is so cute, his names Adam. A couple weeks ago I walked in to pick up my pay check and he kind of just made conversation and a few days later commented on the way I looked saying he didnt even recognize me, making this surprised expression. I never know what to say to him so I always let him start talking to me first. Well the other night he walked into work and was just talking to me about random things that were making me laugh. When he walked by my hostess stand he’d practically bumb into me but just to where his arm would hit mine, and when I’d walk back into the kitchen where he’d be doing the dish room, he’d kind of turn away but his roomate Tommy (who also works in the kitchen) would be like “why’d you turn away,” making him laugh and say shut up. Anytime I’d walk back there Tommy would joke around saying something to Adam about, “hey, shes back here.” So as I was leaving that night when my shift ended, I walked outside and he was on his way back in and he stopped me to ask where I was going. I told him home cause I was tired and he’s like, “well a bunch of us are going out tonight.” After I pretty much blew off the idea, he mentioned how he’s seen me outside of work and knows I like to dress to go out. I asked him if that was bad and he’s like, “no, not at all.” I laughed and said okay and he asked, “so, do you like to go out?” I told him yes and when he asked how old I was I was like, “I’m not telling you.” After a few seconds of him asking me if I was serious I told him yes and asked how old he was. His response was “Older than you,” and when I told him we could stick to that he kind of laughed and agreed. (I’m turning 18 next month and I already knew he was 22) I asked him to walk me to my car and he did but was joking about how I was afraid to go by myself. When we got there he asked, “So you’re seriously not gonna tell me how old you are.” I was like, “I’m definitely serious.” He’s like, “well are you single?” When I told him yes, he leaned down to kiss me and we made out for a few minutes. Then he asked if I had anywhere to be and I told him I was meeting up with our friend Brittany (who also works with us) and he’s like “well were going to (blah blah blah) later tonight and maybe I’ll see you there?” I told him maybe and he said “Well I walked you to your car and now that you’re safe I gotta go back inside so I hope to see you later.” I got in my car and he walked back into work after we said bye. Okay so nowww… We work together tomorrow morning and I have NO idea how to act around him or what to say. Like, do I start a conversation or do I wait for him to, or do I act like nothing happened? It’s going to be awkward opening with him friday morning and I dont know how to react to anything. Please help me, I dont know what to do!